lørdag 24. juni 2017

Revtangen BO June 24th

Some heavy thunderstorms with strong rain in the morning, and nets were not open until shortly before 11. Most nets open until 18, netmeter hours approx. 1600.

Ringed: Collared Dove 1, Meadow Pipit 1, Great Tit 2 (first juveniles), House sparrow 12, Tree Sparrow 1, Common Starling 2, Chaffinch 1, Greenfinch 10, Eurasian Siskin 2, Common Linnet 3, Lesser Redpoll 2. Total =  37. Also 10 controls, including a juvenile Greenfinch not from Revtangen.

Ringmerket: Tyrkerdue 1, heipiplerke 1, kjøttmeis 2, gråspurv 12, pilfink 1, stær 2, bokfink 1, grønnfink 10, grønnsisik 2, tornirisk 3, brunsisik 2. Total = 37. Også 10 kontroller, inkl. en juvenil grønnfink merket annetsteds. 

Observations: Common Quail 1 sining in the fields to the west. 

Alf Tore Mjös. 2 visitors.

søndag 18. juni 2017

Revtangen BO June 18th

Light SW, a bit of rain in the morning, but later around 18 degrees and cloudy. Most nets open 08.30-15.30, netmeter hours approx 1900. 

Ringed: Meadow Pipit 1, Black Redstart 1, House Sparrow 4, Tree Sparrow 6, Common Linnet 2 (first juvenile). Toal = 14. Also 10 controls. 

The surprise of the day was this unseasonal 2cy Black Redstart. Svartrødstjert, 2K.

Ringmerket: Heipiplerke 1, svartrødstjert 1, gråspurv 4, pilfink 6, tornirisk 2. Total = 14. Også 10 kontroller. 

Observations: Seems like Common Ringed Plovers have done reasonably well, there were 19 at Revtangen of which 12 were juveniles. Also 10 Dunlins and 2 Sanderlings at Revtangen. A female Marsh Harrier flew past Reveparken. 

Alf Tore Mjös

onsdag 14. juni 2017

Revtangen BO June 14th

Light SE turning SW, mostly sunny. Nets open 06.45-17.45, netmeter hours approx. 3500. Most of the day there was work in progress in the trapping area, so there was more disturbance than usual. 

Ringed: Collared Dove 2, Meadow Pipit 1, Crested Tit 1, Common Starling 7, House Sparrow 19, Tree Sparrow 1, Greenfinch 1 and Eurasian Siskin 2. Total = 34. Also 17 controls. 

Ringmerket: Tyrkerdue 2, heipiplerke 1, toppmeis 1, stær 7, gråspurv 19, pilfink 1, grønnfink 1 og grønnsisik 2. Total = 34. Også 17 kontroller. 

Crested Tit (1 cy). Less than annual at the BO, but the few we trap are typically in June when the young birds disperse. Toppmeis 1K.

The new wind-breaker was put up today. It will also shield the pond area from traffic on the passing road. A great improvement to the trapping area!

Observations: Grey-headed Wagtail 1 singing in the fields to the west, European Goldfinch one flew over.

Haavard Husebö and Alf Tore Mjös

søndag 11. juni 2017

Revtangen BO June 10th

Light S-SW, mainly cloudy. Nets open 11-18, netmeter hours approx. 2300. The fields west of the station was harvested today, attracting lots of starlings to the area, and some were caught. 

Ringed: Collared Dove 2 (first juvenile), Redwing 1, Common Starling 22, House Sparrow 25, Tree Sparrow 2, Greenfinch 3. Total = 55. 

Ringmerket: Tyrkerdue 2, rødvingetrost 1, stær 22, gråspurv 25, pilfink 2, grønnfink 3. Total = 55. 

Alf Tore Mjøs

lørdag 10. juni 2017

Revtangen BO June 7th

Promising weather with ESE and cloudy, but very few arriving migrants, perhaps because of bad wather in the SE. Nets open 05.30-12.30, netmeter hours approx. 2400. 

Ringed: Fieldfare 1 (first juvenile), Sedge Warbler 1, Blackcap 1, Willow Warbler 1, Chiffchaff 1, House Sparrow 5, Tree Sparrow 1, Lesser Redpoll 1. Total = 12. Also 12 controls. 

Ringmerket: Gråtrost 1, sivsanger 1, munk 1, løvsanger 1, gransanger 1, gråspurv 5, pilfink 1, brunsisik 1. Total = 12. Også 12 kontroller. 

3 Robinson traps overnight i decent temperatures of  ca. 15 degrees produced 15 moth species, including an influx of 56 Silver Y and an Elephant Hawk-moth.

Alf Tore Mjøs

Revtangen BO June 5th

S-SW breeze, part cloudy. Nets open 06.30-16.30, Netmeter hours approx. 3200.

Ringed: Barn Swallow 2, Redwing 1, Chiffchaff 2, Hooded Crow 1, Greenfinch 4, Eurasian Siskin 2. Total = 12. Also 8 controls.

Ringmerket: Låvesvale 2, rødvingetrost 1, gransanger 2, kråke 1, grønnfink 4, grønnsisik 2. Total = 12. Også 8 kontroller. 

Alf Tore Mjøs

lørdag 3. juni 2017

Revtangen BO June 3rd

Light NNE, cloudy, 12-13 degrees. Nets open 08-19, netemeter hour approx. 3400. 

Ringed: Wood Pigeon 1, Collared Dove 1, Barn Swallow 2, Meadow Pipit 4, Redwing 1, Fieldfare 1, Sedge Warbler 1, Common Whitethroat 1, Willow Warbler 2, Common Starling 5, House Sparrow 10, Chaffinch 3, Greenfinch 2, Common Linnet 3 and Lesser Redpoll 2. Total = 39. Also 17 controls. 

Ringmerket: Ringdue 1, tyrkerdue 1, låvesvale 2, heipiplerke 4, rødvingetrost 1, gråtrost 1, sivsanger 1, tornsanger 1, løvsanger 2, stær 5, gråspurv 10, bokfink 3, grønnfink 2, tornirisk 3 og brunsisik 2.

Alf Tore Mjös

tirsdag 30. mai 2017

Revtangen BO May 25th

Light winds, mostly from NW. Fog much of the day. Nets open 09-21, netmeter hours approx. 4000. 

Ringed: Common Redshank 1, Collared Dove 1, Barn Swallow 2 (first this season), Meadow Pipit 1, Fieldfare 6, Sedge Warbler 1, Common Whitethroat 1, Chiffchaff 2, Common Starling 1, House Sparrow 2, Lesser Redpoll 2, Common Linnet 3. Total = 25. Also 7 controls. 

Ringmerket: Rødstilk 1, tyrkerdue 1, låvesvale 2, heipiplerke 1, gråtrost 6, sivsanger 1, tornsanger 1, gransanger 2, stær 1, gråspurv 2, brunsisik 2, tornirisk 3. Total = 25. Også 7 kontroller. 

Common Redshank trapped in the "Revtangen artificial wetlands". The Norwegian redshank colourringing project use orange flags with a 3-letter inscription on the right tibia and a yellow marker on the left tibia.

Alf Tore Mjös. 2 visitors.

søndag 28. mai 2017

Revtangen BO May 23rd

Very little vind in the morning and later a light SE, but very few migrants around. Nets open 05.30-12.30, netmeter hours approx. 2400. 

Ringed: Sedge Warbler 1, Blackcap 1, Garden Warbler 3, Willow Warbler 1, Chiffchaff 1, Spotted Flycatcher 1, Common Starling 3, House Sparrow 1, Lesser Redpoll 3 and Common Linnet 1. Total = 16, also 7 controls. 

Ringmerket: Sivsanger 1, munk 1, hagesanger 3, løvsanger 1, gransanger 1, gråfluesnapper 1, stær 3, gråspurv 1, brunsisik 3 og tornirisk 1. Total = 16. 

Alf Tore Mjøs

Revtangen BO May 19th-21st

A bit of on-and-off trapping these days, with nets open in the afternoon on the 19th, the morning and early afternoon on the 20th and some hours around mid-dag on the 21st. Not a lot going on, the wind was mainly in "the difficult south". 

In total, birds ringed these 3 days: Common Cuckoo 1 (the first in a few years), Eurasian Skylark 1 (first this season, very rarely caught), White Wagtail 2, Meadow Pipit 1, Song Thrush 1, Fieldfare 4, Sedge Warbler 2, Blackcap 3, Common Whitethroat 3, Lesser Whitethroat 2, Willow Warbler 11, Chiffchaff 3, Spotted Flycatcher 3, House Sparrow 5 (the first juveniles of the season on the 19th), Common Starling 1, Chaffinch 1, Greenfinch 1, Eurasian Siskin 1 (first this season), Lesser Redpoll 11, Common Linnet 3. Total = 59. Also 16 controls. 

Ringmerket: Gjøk 1, sanglerke 1, linerle 2, heipiplerke 1, måltrost 1, gråtrost 4, sivsanger 2, munk 3, tornsanger 3, møller 2, løvsanger 11, gransanger 3, gråfluesnapper 3, gråspurv 5, stær 1, bokfink 1, grønnfink 1, grønnsisik 1, brunsisik 11 og tornirisk 2. Total = 59, også 16 kontroller. 

 Two Painted Ladies were a welcome surprise on the 19th, also at least 5 Red Admirals were seen. Tistelsommerfugl.

Terje Lislevand and Alf Tore Mjös.


onsdag 17. mai 2017

Revtangen BO May 17th

Thick fog in the morning hours, and the nets caught little else than water. The fog eventually cleared but a southern 5-7 m/s was far from ideal and the catch was all but impressive. Nets open 06-18, netmeter hours approx. 4000. 

Ringed: Collared Dove 1, Fieldfare 2, Redwing 1, Sedge Warbler 2, Common Whitethroat 3, Willow Warbler 5, Common Starling 2, House Sparrow 1, Chaffinch 1. Total = 18. Also 8 controls, including a Sedge Warbler not from Revtangen. 

Ringmerket: Tyrkerdue 1, gråtrost 2, rødvingetrost 1, sivsanger 2, tornsanger 3, løvsanger 5, stær 2, gråspurv 1, bokfink 1. Total = 18. Også 8 kontroller, inkl. en sivsanger merket annetsteds. 

Observations: 
Revtangen: Brent Goose 3, Common Scoter 70, Long-tailed Duck 1, Bar-tailed Godwit 3, Red Knot 31, Turnstone 17, Purple Sandpiper 1, Dunlin 160, Common Redshank 5, Common Sandpiper 2. 

The doe Roe Deer at the top was courted by the buck in the lower photo, along the gravel road down to Revtangen in the early morning.

Alf Tore Mjös. 1 visitor.

tirsdag 16. mai 2017

Revtangen BO May 15th

Thick fog in the morning, and the nets were not opened until after 9. Winds from the south 6-8 m/s. Nets open until 18, netmeter hours approx. 2800. 

Ringed: Meadow Pipit 2, Greenland Wheatear 1, Whinchat 1 (first this season), Common Whitethroat 1, Willow Warbler 2, Common Starling 1, House Sparrow 1, Yellowhammer 1. Total = 10. 

Ringmerket: Heipiplerke 2, Steinskvett 1 (leucorhoa), buskskvett 1, tornsanger 1, løvsanger 2, stær 1, gråspurv 1, gulspurv 1. Total = 10.

Observations: Common Quail 1 male singing. 

Alf Tore Mjös

Revtangen BO May 14th

Continued SE. Fewer birds than previous days, but still a decent catch.

Ringed: Wood Pigeon 2, White Wagtail 1, Tree Pipit 3, Greenland Wheatear 1, Common Redstart 3, Blackcap 1, Common Whitethroat 2, Lesser Whitethroat 2, Willow Warbler 16, Chiffchaff 1, Common Starling 3, Lesser Redpoll 3, Common Linnet 1. Total = 39. A Blackcap with a Dutch ring was controlled.

Ringmerket: Ringdue 2, linerle 1, trepiplerke 3, steinskvett 1 (leucorhoa), rødstjert 3, munk 1, tornsanger 2, møller 2, løvsanger 16, gransanger 1, stær 3, brunsisik 3, tornirisk 1. Total = 39. En munk med nederlandsk ring ble kontrollert.

Observations: Gyrfalcon 1 2cy. 

Renate Berg, Espen Helgesen and Haavard Husebö. 

Revtangen BO May 13th

Continued SE, but not as many birds around as yesterday. 

Ringed: European Robin 1, Common Redstart 6, Sedge Warbler 1, Blackcap 1, Garden Warbler 4, Common Whitethroat 1, Lesser Whitethroat 1, Willow Warbler 37, Chiffchaff 1, Pied Flycatcher 8, Spotted Flycatcher 2, Common Starling 2, Lesser Redpoll 2. Total = 67. 

Ringmerket: Rødstrupe 1, rødstjert 6, sivsanger 1, munk 1, hagesanger 4, tornsanger 1, møller 1, løvsanger 37, gransanger 1, svarthvit fluesnapper 8, gråfluesnapper 2, stær 2, brunsisik 2. Total = 67. 
 

Observations: Western Marsh Harrier 1 female. 

Renate Berg, Espen Helgesen and Haavard Husebö

mandag 15. mai 2017

Revtangen BO May 12th

ESE winds all over southern Norway today produced a large fall of migrants, and several bird observatories reported record numbers of birds caught and ringed (more than 600 at Jomfruland, more than 300 at Utsira). A good spring catch at Revtangen also:

Collared Dove 2, White Wagtail 1, Meadow Pipit 1, Common Redstart 11, Greenland Wheatear 1 (first this season), Song Thrush 2, Redwing 2, Blackcap 2, Garden Warbler 1 (first this season), Lesser Whitethroat 7, Common Whitethroat 8, Willow Warbler 91, Chiffchaff 1, Pied Flycatcher 3, Spotted Flycatcher 1 (first this season), House Sparrow 1, Brambling 1, Greenfinch 2, Lesser Redpoll 4, Common Linnet 3. Total = 145.

Ringmerket: Tyrkerdue 2, linerle 1, heipiplerke 1, rødstjert 11, steinskvett (leucorhoa) 1, måltrost 2, rødvingetrost 2, munk 2, hagesanger 1, møller 7, tornsanger 8, løvsanger 91, gransanger 1, svarthvit fluesnapper 3, gråfluesnapper 1, gråspurv 1, bjørkefink 1, grønnfink 2, brunsisik 4, tornirisk 3. Total = 145. 

Haavard Husebö, Renate Berg and Espen Helgesen

søndag 7. mai 2017

Revtangen BO May 6th

Light shifting breeze, mostly sunny. Most nets open 10-21, netmeter hours approx. 3000.

Ringed: Common Redstart 2, Blackcap 3, Willow Warbler 3, Chiffchaff 1, House Sparrow 2, Brambling 1, Greenfinch 1, Common Linnet 1. Total = 14. Also 7 controls. 

Ringmerket: Rødstjert 2, munk 3, løvsanger 3, gransanger 1, gråspurv 2, bjørkefink 1, grønnfink 1, tornirisk 1. Total = 14. Også 7 kontroller. 

Observations: The almost windless conditions provided a rare opportunity to count divers and other birds resting on the sea, so we checked the sea area from Revtangen - Reve kai with the telescope. The count included 87 Great Northern Loons, 5 Red-throated Loons, 180 Common Scoter, 200 Long-tailed Ducks, 8 Razorbill, 7 Common Guillemot and 20 Black Guillemot. 

We tried two Robinson-traps last night but only 3 species of moths caught, includingh this Powdered Quaker (Orthosia gracilis). Punktseljefly. 


A long awaited addition to the lepidoptera list at Revtangen BO: This Emperor Moth (Saturnia pavonia) was attracted with a pheromone-lure. Nattpåfugløye.

A new species of Long-horn Beetle at Revtangen BO was dicovered on a furled-up mistnet, Rhagium inquisitor. Bartreløper.

Alf Tore Mjös. 1 visitor.

lørdag 6. mai 2017

Revtangen BO May 5th

Still sunny and very quiet on the migrant front. Light NE in the morning turning SW and then NW in the middle of the day. Nets open 05.15, netmeter hours approx. 3200. 

Ringed: White Wagtail 1, Meadow Pipit 1, European Robin 1, Lesser Whitethroat 1, Willow Warbler 1, Wood Warbler 1, Chiffchaff 3, Common Starling 1, House Sparrow 1, Lesser Redpoll 2, Yellowhammer 1. Total = 14. Also 8 controls, including a Common Blackbird not from Revtangen. 

No doubt the highlight of todays catch, Wood Warbler is less than annual at Revtangen BO but most years we ring one or two. Bøksanger.

Ringmerket: Linerle 1, heipiplerke 1, rødstrupe 1, møller 1, løvsanger 1, bøksanger 1, gransanger 3, stær 1, gråspurv 1, brunsisik 2, gulspurv 1. Total = 14. Også 8 kontroller, inkl. en svarttrost merket annetsteds. 

Observations: Revtangen: Yellow-billed Loon 1, Great Northern Loon 34, Red-throated Loon 18, Black-throated Loon 4, Whimbrel 7, Bar-tailed Godwit 2, Turnstone 1, Gyrfalcon 1 2cy.

Eurasian Curlew with colourrings, just a few hundred meters away from where it wass ringed as a chick in 2013. Storspove. 
 

This male Black-tailed Godwit was feeding close to the colourringed Curlew. The future for this popultion of the nominate subspecies breeding at Jaeren seems dark, after the Norwegian government abandoned the action plan a few years ago. So far we have seen no other initiative to save this species, seems like the governments plan is to wait until its too late - problem solved. Svarthalespove hann. 

Whimbrels and one Bar-tailed Godwit past Revtangen. Småspove og en lappspove. 

Gyrfalcon 2cy. Jaktfalk 2K. 

Another addition to the Revtangen Wetland System was added yesterday and today. We've removed a few trees and bushes and replaced them with another small pool and a small "creek". The plan is to fill parts of the pool and most of the "creek" with water plants.

Haavard Husebö and Alf Tore Mjös. 1 visitor.

 

Revtangen BO May 4th

Still sunny. Light easterlies, turned west around 12. A slight improvement from yesterday regarding birds, but not by much. Nets open 05.30-14.30, netmeter hours approx. 3000. 

Ringed: Meadow Pipit 1, European Robin 2, Common Redstart 1, Blackcap 1, Willow Warbler 11, Chiffchaff 3, Pied Flycatcher 1, Common Starling 1, Mealy Redpoll 4, Lesser Redpoll 2. Total = 27. 

Ringmerket: Heipiplerke 1, rødstrupe 2, rødstjert 1, munk 1, løvsanger 11, grananger 3, svarthvit fluesnapper 1, stær 1,. gråsisik 4, brunsisik 2. Total = 27. 

A team from NRK (Norwegian Broadcasting) paid us a visit today, and a bit of migrant-TV was broadcasted nation-wide in the evening. We also got a visit from a schoolclass from Tryggheim. 

Haavard Husebö and Alf Tore Mjös. 17 visitors, including 12 schoolchildren.

onsdag 3. mai 2017

Revtangen BO May 3rd

Light shifting breeze, NE in the morning turning NW just after 9. Part cloudy, 6 degrees around dawn. Compared to the previous days very quiet on the migrant front. Nets open 05-12, netmeter hours 2400.Preliminary work on the foundations for a new windbreaking-wall was finished. 

Ringed: White Wagtail 1, Meadow Pipit 1, Fieldfare 1, Common Blackbird 1, Common Whitethroat 1, Willow Wabler 9, Chiffchaff 1, Pied Flycatcher 1, Mealy Redpoll 1, Lesser Redpoll 1 and Common Linnet 2. Total = 20. Also 7 controls, including a Lesser Redpoll ringed elsewhere, two Willow Warblers from 2016 and a Wood Pigeon from 2012. 

Ringmerket: Linerle 1, heipiplerke 1, gråtrost 1, svarttrost 1, tornsanger 1, løvsanger 9, gransanger 1, svarthvit fluesnapper 1, gråsisik 1, brunsisik 1 og tornirisk 2. Total = 20. Også 7 kontroller, inkl. en brunsisik ringmerket annetsteds. 

Observations: Yellow Wagtail 1 flew over.

Haavard Husebö and Alf Tore Mjös

tirsdag 2. mai 2017

Revtangen BO May 2nd

Light NE turning NV then S. Sunny. Nets open 06-16, netmeter hours approx. 3400. 

Ringed: Song Thrush 1, Redwing 1, Common Blackbird 3, Ring Ouzel 1, European Robin 3, Common Redstart 2, Sedge Warbler 1, Blackcap 1, Common Whitethroat 3, Willow Warbler 17, Chiffchaff 1, Pied Flycatcher 1, House Sparrow 1, Mealy Redpoll 3, Lesser Redpoll 1, Common Linnet 1.Total = 41. Also 10 controls. 

Ringmerket: Måltrost 1, rødvingetrost 1, svarttrost 3, ringtrost 1, rødstrupe 3, rødstjert 2, sivsanger 1, munk 1, tornsanger 3, løvsanger 17, gransanger 1, svarthvit fluesnapper 1, gråspurv 1, gråsisik 3, brunsisik 1, tornirisk 1. Total = 41. Også 10 kontroller.

Observations: 
Bird Observatory: Pallid Harrier 1, Golden Plover 300. 
Revtangen: Bar-tailed Godwit 10, Grey Plover 2, Grey-headed Wagtail (M.f.flava) 1 male. 

Haavard Husebö, Alf Tore Mjös, Njaal Sölvberg. 1 visitor.

mandag 1. mai 2017

Revtangen May 1st - large fall of migrants

Today a moderately strong ESE displaced a large number of migrants towards the west, and produced a large fall along the coast of Rogaland county. Revtangen BO was no exception, and we had the second best spring day we've had the last ten years. Nets open 05.30-19.30, netmeter hours approx. 4800. ESE turning S around 14.30, after the wind turned the trapping conditions became very difficult. 

Ringed: Wood Pigeon 2, Eurasian Wryneck 1, Tree Pipit 1, European Robin 17, Common Redstart 23, Song Thrush 2, Blackcap 9, Common Whitethroat 4, Lesser Whitethroat 1, Willow Warbler 91, Chiffchaff 27, Pied Flycatcher 6, House Sparrow 1, Lesser Redpoll 1, Common Linnet 5. Total = 192. 

Common Redstarts brightened up the catch today, and 23 is a very high number in one day. 3cy+ male. Rødstjert 3K+ hann.

Ringmerket: Ringdue 2, vendehals 1, trepiplerke 1, rødstrupe 17, rødstjert 23, måltrost 2, munk 9, tornsanger 4, møller 1, løvsanger 91, gransanger 27, svarthvit fluesnapper 6, gråspurv 1, brunsisik 1, tornirisk 5. Total = 192. 

Observations: Gyrfalcon 1 2cy, Peregrine Falcon 1 adult,  Common Kestrel 2, Short-eared Owl 1, Whinchat 2, Mistle Thrush 1 migrating N, Greenshank 2, Green Sandpiper 2.

Renate Berg, Espen Helgesen, Alf Tore Mjös and Morten Stokke. 7 visitors. 

søndag 30. april 2017

Revtangen BO April 30th

Clear skies in the morning, and therefore a bit colder han yesterday - only 3 degrees and a frosty ground. The wind was light from SE the first few hours, but turned south and increased quite a lot. Trapping conditions were very poor after 9.30 with wind and sun in all the nets. 

Nets open 06-16, netmeter hours approx. 3000. 

Ringed: Eurasian Wryneck 2, White Wagtail 1, Meadow Pipit 2, European Robin 4, Common Redstart 2, Black Redstart 1, Song Thrush 2, Sedge Warbler 1, Common Whitethroat 1, Lesser Whitethroat 1, Willow Warbler 19, Chiffchaff 8, Siberian Chiffchaff 1, Pied Flycatcher 1, Greenfinch 1, Lesser Redpoll 1. Total = 48. Also 8 controls, including a Chiffchaff with a ring from Radolfzell/Germany. 

Lots of species made their first appearance in 2017 today. In order of apperance:

  
Sedge warbler. Sivsanger. 
 
Common Whitethroat, 2cy. Tornsanger 2K. 

 Lesser Whitethroat. Møller. 

Black Redstart 2cy male. Svartrødstjert, 2K hann. 

Eurasian Wryneck, 2cy. Vendehals 2K. 
 
Common Redstart, 3cy+ male. Rødstjert 3K+ hann. 

Ringmerket: Vendehals 2, linerle 1, heipiplerke 2, rødstrupe 4, rødstjert 2, svartrødstjert 1, måltrost 2, sivsanger 1, tornsanger 1, møller 1, løvsanger 19, gransanger 9 (inkl. 1 tristis), svarthvit fluesnapper 1, grønnfink 1, brunsisik 1. Total = 48. Også 8 kontroller, inkl. en gransanger med ring fra Radolfzell/Tyskland. 

Alf Tore Mjøs. 1 visitor.

lørdag 29. april 2017

Revtangen BO April 29th

Light SE and cloudy in the morning. Later more sunny the wind turned south around 15 and trapping conditions became poor after that. Nets open 06-15, netmeter hours approx. 3000. 

Ringed: Meadow Pipit 3, White Wagtail 2, Pied Wagtail 1, Dunnock 6, European Robin 31, Song Thrush 4, Common Blackbird 1, Willow Warbler 46, Chiffchaff 6, Pied Flycatcher 4, Common Starling 4, House Sparrow 3, European Greenfinch 3, Common Linnet 4. Total = 118. Also 6 controls, including a Willow Warbler from Belgium. 

Despite no more than 5 degrees in the morning, the first decent fall of tropical migrants started just after dawn. All the 46 Willow Warblers ringed today were males, and quite a few were greyish birds with dark legs like this one. Løvsanger.

Ringmerket: Heipiplerke 3, linerle 2, svartryggerle 1, jernspurv 6, rødstrupe 31, måltrost 4, svarttrost 1, løvsanger 46, gransanger 6, svarthvit fluesnapper 4, stær 4, gråspurv 3, grønnfink 3, tornirisk 4. Total = 118. Også 6 kontroller, inkl. en løvsanger med belgisk ring.

Pied Wagtail, 2cy male. Svartryggerle. 

Pied Flycatcher 3cy+ male. 4 were caught, indicating a decent arrival of this species into Norway today. Svarthvit fluesnapper, 3K+ hann. 

Alf Tore Mjös and Morten Stokke. 1 visitor.


Revtangen BO April 27-28th

Finally, it seems like the weather is improving. The wind dropped on Thursday and changed to NE on Friday, although still rather cold (3 degrees in the morning on Friday, increasing to 10 during the day - heavy clouds in the morning but mostly sunny later). 

Thursday was workday - we rented a small excavator and moved some bushes around, dug a small new pond and dug foundations for a wind-breaking wall against the road by the pond area. About half the nets were open 08-15, and 10 birds were ringed: Meadow Pipit 1, Fieldfare 4, Chiffchaff 1, Great Tit 1 and Common Linnet 3. 

Friday all the nets were open 06-17, netmeter hours approx. 3000. NE turning east in the afternoon. Ringed: Green Sandpiper 1, Wood Pigeon 1, European Robin 1, Common Blackbird 1, Fieldfare 1, Willow Warbler 1, Common Starling 5, House Sparrow 1, Greenfinch 2. Total = 14. 

The first spring catch of Green Sandpiper at Revtangen BO. The bird aimed for the large pool without any playback used. Green Sandpipers are ringed with a yellow flag with a 3-letter inscription at the right tibia, and ea red marker on the left tibia. About a week ago we got our first resighting of a Green Sandpiper in the field, in Suffolk, England.

Haavard Husebö, Alf Tore Mjös and Njaal Sölvberg.

onsdag 19. april 2017

Spring 2017 so far

So far the spring of 2017 has been a very poor one at Revtangen BO. Windy, and completely dominated by winds from the western and northwestern sector. In these conditions trapping with mist-nets at Revtangen BO is not really an option. We've only trapped on four occations so far the last month:

April 18th, nets open 05.30-12:
Ringed: European Robin 5, Common Blackbird 3, Fieldfare 1, Song Thrush 3, Redwing 1, Common Starling 13, House Sparrow 1, Common Linnet 2 and Yellowhammer 1. Total = 30. 

April 14th, 08-12: 
Ringed: Wood Pigeon 2, Winter Wren 1, Dunnock 1, European  Robin 1, Fieldfare 1, Common Starling 1, House Sparrow 1, Chaffinch 2, Greenfinch 5, Common Linnet 1 and Yellowhammer 2. Total = 18. 
9 visitors.

Adult White-tailed Eagle soaring low over Revtangen BO on April 14th.  

April 8th (afternoon):
Ringed: European Robin 4, Common Blackbird 4, Redwing 2, Goldcrest 3, Common Starling 1, House Sparrow 5, Tree Sparrow 3, Chaffinch 1, Brambling 1, Greenfinch 6. Total = 30. 

March 28th:
Common Blackbird 8, Mistle Thrush 1, Goldcrest 4, House Sparrow 2, Tree Sparrow 1, Chaffinch 1, Yellowhammer 3. Total = 20. 

Mistle Thrush is a rare catch at Revtangen BO, this one was the 8th ever ringed at the BO.

Haavard Husebö and Alf Tore Mjös






lørdag 18. mars 2017

Results from 2016 - recoveries and controls

Winter has made a small comeback with a cold-front over Southern Norway at the moment, the stiff NW and low temperatures means trapping is out of the question. So in stead we'll report some of the controls/recoveries we've received the past months. starting with the tits. 

Blue tits were on the move last autumn, and we ringed 1156 and controlled quite a few that were already ringed. Typically, blue tits are short-distance migrants with distances above 200 km rarely recorded. Movements typically follow the coast from the east towards the west and northwest. 

The results last autumn follow this pattern:

BLUE TIT

14 Blue tits ringed at Lista Bird observatory was controlled at Revtangen BO. The distance between the two bird observatories is 95 km, and the direction of these movements is NW. 3 of the birds covered this distance in 3 days. One bird was ringed at Lista BO on 26th September, controlled at Revtangen BO on 4th October before it continued on a northeasterly direction and was killed against a window in Suldal, Rogaland on 9th December. Only one bird ringed at Revtangen BO was kontrolled at Lista, but this one was ringed as a 3cy+ female on April 4th 2016 and controlled at Slevdalsvann on October 20th. One bird ringed at Eitlandsneset, Lyngdal (114 km to the SE) was controlled at Revtangen 5 days later. A bird ringed a sa young in the nest at Stölen, Farsund (96 km to the SE) on June 6th was controlled at Revtangen BO on October 1st.

Two birds from Eigeröy Fyr (41 km to the SE) were controlled at Revtangen BO 2 and 5 days after ringing. Two birds ringed at Holmane, Haa (36 km to the south) were controlled at Revtangen, one of these the day after it was ringed. One bird from Revtangen flew the oppsite way and was controlled at Holmane. One bird ringed as a young in the nest at Bergsfjellet, Gjesdal (25 km to the east) on May 26th was controlled at Revtangen on October 1st.

8 birds ringed at Revtangen BO was controlled at Bömyra 28 km to the north. Only one bird ringed at Bömyra was controlled at Revtangen BO. One bird was controlled at Syre, Karmöy (47 km to the north) and 3 birds were controlled at Utsira, 71 km NW. Two of the birds covered the distance to Utsira in 4 days. 

Two birds travelling in the "wrong" direction were singles ringed at Blikshavn, Karmöy on October 1st and controlled at Revtangen on October 19th (51 km direction south) and a bird ringed Revtangen on October 1st and controlled Jölle, Farsund on October 24th. 

Finally, a couple of early winter records og single birds from Revtangen in early October controlled at Ims, Sandnes on December 3rd and Nessa, Tysvaer on February 19th 2017. 

LONG-TAILED TIT

1cy+ Eggegrund, Sweden October 5th controlled Revtengen BO October 30th (709 km WSW).

1 cy+ Lista BO October 19th controlled Revtangen October 23rd.

Alf Tore Mjös


søndag 12. mars 2017

2017 - the start of the trapping season

Spring is arriving, but so far it is still a little early for most passerine migrants. We have done a few trapping sessions at the feeder in January and February, but the catch has been very limited. This afternoon (March 12th) the nets were open between 14.30-18.30, and there were already a few migrants around: Dunnock 1, Fieldfare 1, European Robin 2, Goldcrest 3. 

In total we have ringed 49 birds so far in 2017: Collared Dove 1, Dunnock 1, Common Blackbird 7, Fieldfare 1, Goldcrest 3, House Sparrow 11, Tree Sparrow 6, Chaffinch 2, Greenfinch 3, Mealy Redpoll 1, Yellowhammer 11. Total = 49. Also 99 controls.

Alf Tore Mjös. 5 visitors.

Summary of 2016


The spring season 2017 is approaching and it's long overdue to give a summary of the 2016 season.
Last year was the best since 2010 at Revtangen BO, much because of the untypically pleasant and calm September and October, allowing us a lot of trapping time during favourable conditions. The wader trapping season was a disaster though, it may seem as our trapping site at Revtangen has already fallen vicim to climate change, since repeated episodes of high water and strong winds have removed lots of sand from the area. As a result, rotting seaweed is not piling up as usual, but removed by the sea before they get productive.

The table below has two columns: The left one is the result for Revtangen bird observatory, the right is our ringing results from other sites, mainly in connection to our urban gulls project "URBPOP".
Four species were ringed for the first time at Revtangen: Stock dove, feral pigeon, oriental turtle dove and pine bunting. The alder flyctcher was a first for Norway, trapped on the island Kvitsöy by Björn Mo to collect biometrics and a DNA-feather sample for identification.

Species Revtangen BO Other sites Total
Greylag Goose
1 1
European Shag
1 1
European Storm Petrel
7 7
Mute Swan
4 4
Mallard
77 77
Eurasian Wigeon
1 1
Mandarin Duck
1 1
Tufted Duck
10 10
Coot
19 19
Moorhen
10 10
Water Rail 2 1 3
Herring gull
194 194
Lesser Black-backed Gull
306 306
Great Black-backed Gull
103 103
Common Gull
191 191
Black-headed Gull
147 147
Iceland Gull
1 1
Sparrowhawk 14 2 16
Common Kestrel 1
1
Merlin 1
1
Peregrine 1
1
Lapwing
2 2
Bar-tailed Godwit 7
7
Dunlin 140
140
Little Stint 5
5
Red Knot 13
13
Sanderling 12
12
Turnstone 1
1
Green Sandpiper 24
24
Common Ringed Plover 3
3
Oystercatcher
1 1
Woodcock 5
5
Great Snipe
9 9
Common Snipe 5 1 6
Wood Pigeon 6
6
Feral Pigeon 1
1
Stock Dove 1
1
Collared Dove 46
46
Oriental Turtle Dove 1
1
Tengmalm's Owl 1
1
Tawny Owl
2 2
Eurasian Eagle Owl
1 1
Black Woodpecker 1
1
Great Spotted woodpecker 4 1 5
Lesser Spotted Woodpecker 1
1
Wryneck 3
3
Alder flycatcher
1 1
Skylark 1
1
Sand Martin 45
45
Barn Swallow 53
53
Rock Pipit
1 1
Tree Pipit 149
149
Olive-backed Pipit 2
2
Meadow Pipit 805 3 808
White Wagtail 28
28
Pied Wagtail 1
1
Grey Wagtail 92
92
Wren 215 3 218
Bohemian Waxwing 45 100 145
Dunnock 26 3 29
Robin 380 7 387
Redstart 44
44
Black Redstart 1
1
Thrush Nightingale 1
1
Bluethroat 2 2 4
Whinchat 4
4
Northern Wheatear 29
29
Greenland Wheatear 11
11
Song Thrush 113
113
Redwing 219 5 224
Fieldfare 195 11 206
Blackbird 248 34 282
Ring Ouzel 1
1
Icterine Warbler 1
1
Blackcap 561 3 564
Common Whitethroat 61
61
Lesser Whitethroat 19
19
Garden Warbler 137
137
Barred Warbler 2
2
Grasshopper Warbler 12
12
Reed Warbler 36
36
Blyth's Reed Warbler 2
2
Sedge Warbler 46
46
Wood Warbler 2
2
Willow Warbler 363 2 365
Chiffchaff 221 1 222
Siberian Chiffchaff 12
12
Yellow-browed Warbler 9
9
Goldcrest 455 1 456
Firecrest 1
1
Spotted Flycatcher 22
22
Pied Flycatcher 13
13
Long-taild Tit 408
408
Great Tit 149 256 405
Coal Tit 28 2 30
Blue Tit 1156 132 1288
Eurasian Nuthatch 3 7 10
Tree Creeper 15
15
Starling 106 1 107
House Sparrow 355 17 372
Tree Sparrow 203 20 223
Spotted Nutcracker 1
1
Eurasian Jay
1 1
Magpie 5 3 8
Hooded Crow 2
2
Jackdaw 1
1
Chaffinch 162 17 179
Brambling 295 27 322
Greenfinch 379 69 448
Siskin 11 11 22
Linnet 161
161
Twite 10
10
Lesser Redpoll 96
96
Mealy Redpoll 270
270
Arctic Redpoll 5
5
Common Rosefinch 4
4
Common Crossbill 3
3
Bullfinch 2
2
Hawfinch 1
1
Goldfinch 29 3 32
Reed Bunting 24 3 27
Yellowhammer 260 1 261
Pine Bunting 1
1
Total 9129 1840 10969