Revtangen BO September 18th

Same weather, same playback strategy. Nets open 06-15. Again, the wind turned south around 12 and very little trapped after that. Netmeter hours approx. 2900. 

Ringed: Great Spotted Woodpecker 1, Meadow Pipit 34, Winter Wren 2, Dunnock 2, Northern Wheatear 1, European Robin 12, Redwing 1, Song Thrush 1, Grasshopper Warbler 1, Garden Warbler 4, Barred Warbler 1, Blackcap 10, Willow Warbler 3, Chiffchaff 11, Goldcrest 9, Great Tit 2, Blue Tit 24, Coal Tit 1, Tree Sparrow 1, Chaffinch 2, Common Linnet 1. Total = 124. Also 5 controls. 

The second Barred Warbler of the autumn was ringed today. Hauksanger.

Ringmerket: Flaggspett 1, heipiplerke 34, gjerdesmett 2, jernspurv 2, steinskvett 1, rødstrupe 12, rødvingetrost, måltrost 1, gresshoppesanger 1, hagesanger 4, hauksanger 1, munk 10, løvsanger 3, gransanger 11, fuglekonge 9, kjøttmeis 2, blåmeis 24, svartmeis 1, pilfink 1, bokfink 2, tornirisk 1. Total = 124. Også 5 kontroller. 

Lots of Black Darters (Sympetrum danae) are enjoying our new pools at the moment, but so far the warm southerlies has not brought any rare Odonata. Svart høstlibelle.

Renate Berg, Espen Helgesen, Paul Terje Haarr and Alf Tore Mjös. 7 visitors.

Revtangen BO September 17th

Weather much as previous days, light easterlies/southeasterlies in the morning, turning south around 11-12. Playback as previous days. Nets open 06-18, netmeter hours approx. 3900. 

Ringed: Grey Wagtail 4, Meadow Pipit 16, Dunnock 1, Northern Wheatear 3 (2 leucorhoa), European Robin 6, Common Blackbird 1, Song Thrush 2, Garden Warbler 7, Blackcap 6, Chiffchaff 8, Yellow-browed Warbler 1, Goldcrest 2, Blue Tit 6, Chaffinch 2, Eurasian Siskin 1. Total = 66. Also 12 controls. 

Surprisingly the Barred Warbler ringed on August 20th and last controlled on August 26th turned up in a mistnet again today. It had gained 8,8 grams since ringed. Hauksanger 1K. 

Ringmerket: Vintererle 4, heipiplerke 16, jernspurv 1, steinskvett 3 (2 leucorhoa), rødstrupe 6, svarttrost 1, måltrost 2, hagesanger 7, munk 6, gransanger 8, gulbrynsanger 1, fuglekonge 2, blåmeis 6, bokfink 2, grønnsisik 1. Total = 66. Også 12 kontroller. 

Renate Berg, Ingvald Ekeland, Espen Helgesen, Alf Tore Mjøs and Morten Stokke. 2 visitors.

Revtangen BO September 16th

The warm southeast continues. Almost no wind in the early hours, then light SE turning S, increasing and turning back towards SE. Sunny in periods, but also cloudy at times. Playback as yesterday. Nets open 06-19, netmeter hours approx. 4200. 

Ringed: Grey Wagtail 2, Tree Pipit 2, Meadow Pipit 16, Dunnock 2, Winter Wren 3, Northern Wheatear 5 (all leucorhoa), Whinchat 1, European Robin 10, Common Redstart 2, Song Thrush 2, Redwing 1, Common Blackbird 1, Fieldfare 1, Garden Warbler 5, Blackcap 23, Willow Warbler 4, Chiffchaff 14, Yellow-browed Warbler 1, Goldcrest 3, Great Tit 4, Blue Tit 2, Pied Flycatcher 1, House Sparrow 3, Chaffinch 4, Greenfinch 3. Total = 115. Also 17 controls. 

The second Yellow-browed Warbler of the season was trapped today. Gulbrynsanger.

Ringmerket: Vintererle 2, trepiplerke 2, heipiplerke 16, jernspurv 2, gjerdesmett 3, steinskvett 5 (alle leucorhoa), buskskvett 1, rødstrupe 10, rødstjert 2, måltrost 2, rødvingetrost 1, svarttrost 1, gråtrost 1, hagesanger 5, munk 23, løvsanger 4, gransanger 23, gulbrynsanger 1, fuglekonge 3, kjøttmeis 4, blåmeis 2, svarthvit fluesnapper 1, gråspurv 3, bokfink 4, grønnfink 3. Total = 115. Også 17 kontroller. 

Observations: Black-throated Diver 1 flying south, Red-breasted flycatcher 1 (1cy) , Hen Harrier 1, Common Kestrel 2, Yellow Wagtail 2. Notable migration of Red-throated Diver with 41 seen flying south, also lots of Barn Swallows on the move south over the fields to the west. 

The Robinson Traps are still producing migrants, including 137 Silver Y, 8 Rush Veneer (Nomophila noctuella), 1 Dark Sword-grass (Agrotis ipsilon) and 1 Rusty-dot Pearl (Udea ferrugalis). The highlighty today was the second Norwegian record of the tortricid moth Crocidosema plebejana.

Crocidosema plebejana. Kattostvikler. 

Haavard Husebö, Alf Tore Mjøs, Morten Stokke and Njaal Sölvberg. 1 visitor.

Revtangen BO September 15th

The heatwave continues, another night with almost no wind and 18 degrees gave way to another sunny and very warm day. The wind remained SE for a little longer today, but trapping was slow as soon the sun appeared. Playback much as yesterday, Chiffchaff, Garden Warbler and Yellow-browed Warbler through the night and Meadow Pipit, Grey Wagtail and Chiffchaff by day. Nets open 06-15, netmeter hours approx. 2900. 

Ringed: Sparrowhawk 1, Peregrine Falcon 1, Tree Pipit 1, Meadow Pipit 10, Winter Wren 1, Dunnock 3, Northern Wheatear 1 (leucorhoa), European Robin 5, Song Thrush 1, Redwing 1, Garden Warbler 12, Blackcap 17, Willow Warbler 1, Chiffchaff 11, Goldcrest 1, Great Tit 2, Blue Tit 6, Eurasian Treecreeper 1 (first this season), Tree Sparrow 1, Chaffinch 5, Brambling 2, Greenfinch 9, Lesser Redpoll 3. Total = 96. Also 5 controls. 

1 cy Peregrine Falcon caught in the large nets by the pools. Only the 3rd ever ringed at the bird observatory. 

This Hawk Owl used our net poles at hunting posts during the night, enough lit up by the Robinson traps for the autofocus to work! It disappeared around dawn. Haukugle.

Once again the Robinson traps produced some interesting species:

Two stunning specimens of Merveille du Jour (Griposia aprilina) was a new species for Revtangen BO. Grønt eikefly.

Another Scarce Bordered Straw caught today. Pestfagerfly.

Western Conifer Seed-bug (Leptoglossus occidentalis), probably only the 3rd Norwegian record of this invasive species introduced to Europe from North America.

Haavard Husebïo, Alf Tore Mjøs and Njaal Sölvberg. 8 visitors, including a group of 6 from Möllehagen Skolesenter.

Revtangen BO September 14th

The unseasonal (for any season!) hot weather continues, today we had the warmest day of the year with tempertures in the high 20ties in the afternoon. Around dawn we had very light easterlies and a cloud cover, perfect trapping conditions but again this was terminated by an irritating wind from the south from around 11. Playback use as yesterday. Nets open 06-14, netmeter hours approx. 2600.

Ringed: Common Kestrel 1, Grey Wagtail 3, Meadow Pipit 11, Dunnock 2, European Robin 9, Common Redstart 1, Fieldfare 2, Song Thrush 2, Reed Warbler 1, Garden Warbler 6, Blackcap 19, Common Whitethroat 1, Chiffchaff 7, Willow Warbler 4, Goldcrest 2, Blue Tit 7, Tree Sparrow 5, Brambling 1, Greenfinch 4, Eurasian Siskin 1, Lesser Redpoll 2, Yellowhammer 1. Total = 92. Also 5 controls, including Reed Bunting and Blue Tit not from Revtangen BO.

Kestrels are rarely trapped and this is only the 9th ringed at Revtangen BO.

Observations: Grey Wagtail ca. 15, Little Bunting 1. 

Our 3 Robinson Traps are out all night during these unusual conditions, today there was a decent collection og migrant moths including 13 Rush Veneer, 1 Rusty-dot Pearl, 75 Silver Y and one Gem. 

The Gem (female). Vandrelinjemåler. 

The Robinson traps also produced a new moth species for Revtangen BO, this Black Rustic (Aporophyula nigra). Stort lyngheifly.

Asbjørn Folvik, Haavard Husebö and Alf Tore Mjös. 4 visitors.

Revtangen BO September 13th

Unusually high temperatures for September at the moment, we had around 17 degrees through the night rising to well above 22 in the middle of the day. Nets open 06-17.30, netmeter hours approx. 3500. Playback on Garden Warbler, European Robin, Chiffchaff and Yellow-browed Warbler through the night, Meadow Pipit, Tree Pipit and Grey wagtail during the day. 

Ringed: Sparrowhawk 2, Collared Dove 2, Tree Pipit 3, Meadow Pipit 17, Grey Wagtail 2, Dunnock 1, European Robin 3, Northern Wheatear 2 (1 leucorhoa), Redwing 1, Song Thrush 1, Garden Warbler 2, Blackcap 8, Willow Warbler 1, Chiffchaff 7, Yellow-browed Warbler 1 (first this season), Coal Tit 1, House Sparrow 8, Tree Sparrow 8, Chaffinch 5, Greenfinch 8, Lesser Redpoll 1, Reed Bunting 1. Total = 85. Also 4 controls. 

The highlight in the robinson traps this morning was no doubt the Scarce Bordered Straw (Helicoverpa armigera), probably the first record in Norway since the invasion in 2006.

Frosted Orange (Gortyna flavago), a Revtangen speciality.

Haavard Husebö and Alf Tore Mjös. We also had a visit from 26 studens and one teacher from Godalen Skole.

 

Revtangen BO September 12th

Another evening session with 9 walk-in traps at Revtangen 18-21 produced 38 Dunlin, 1 Common Ringed Plover and 11 Sanderling. Total = 50.

50 Brent geese migrated south, and two Peregrines (adult and 1 cy) hunted waders in the area. 

Alf Tore Mjös