Saturday, 4 June 2011

Juvenile behaviour!

No, not my behavior, or my brothers (for once)! It's the time of year when we start seeing good numbers of juveniles from the early breeders.

SSNR 30/05/11: 21 birds of 8 species (retraps in brackets)

Great Tit 9 (0) - including 6 juveniles
Whitethroat 4 (1) - the retrap being first ringed as an adult June 2010.
Grasshopper Warbler 1 (0) - the 5th this year for this site and the first female
Blackcap 1 (0) - only the third of this species for the site
Dunnock 0 (2)
Chiff Chaff 1 (0)
Sedge Warbler 1 (0)
Great Spotted Woodpecker 0 (1) - A regularly caught male.

SSNR yesterday 04/06/11: 55 birds of 11 species (retraps in brackets)

Blue Tit 4 (3) - all the new birds were juveniles
Great Tit 4 (0) - including 3 juveniles
Whitethroat 6 (3) - one of the retraps being from June 2010
Chaffinch 9 (1) - including 6 juveniles
Goldfinch 7 (2) - including 2 juveniles
Garden Warbler 3 (0) - 2 males and a female (NEW FOR SITE)
Grasshopper Warbler 0 (2) - a pair
Willow Warbler 1 (0) - the first adult caught on site
Blackcap 8 (0) - mostly adult males except 1 adult female and one juvenile
Dunnock 0 (1) - first ringed on 3rd March 2011
Sedge Warbler 0 (1) - a retrap from May 2011

This is not typical of visits to SSNR and it came as a very welcome surprise. I suspect there are a few reasons for this:

1. weather - overcast first thing (lifting but not completely later on) and wind from the east ('light' to start with increasing to 'far too' by the end of the session). Normal = windy and from the west. Perhaps this was partially responsible for catching a lot of blackcaps (rarely ringed here) and the Garden Warblers (where did they come from?!?).

Above: Garden Warbler

2. I've not ringed at this time of year here with a feeding station. Without this, the catch would consist mainly of Warblers.

3. Juveniles - it's that time of year. Blackbirds, Robins, Dunnocks, Whitethroats, Blue Tits, Great Tits, Song Thrushes, Chaffinches, Starlings, Blackcaps - I have seen fledged young of all these species around Bedfordshire. Some examples coming up (all juveniles):

Above: Great Tit

Above: Blue Tit (taken at Priory Country Park).

Above: Robin (taken at Priory Country Park - no juvenile Robins have been caught so far at SSNR).

Above: Blackcap

Above: Goldfinch

Above: Chaffinch

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