Wednesday, 2 August 2017

August - Two new Black Headed Gulls

August 19th

The month has been spent looking at Juvenile Gulls from the mixed colonies and for my own education brushing up on Juvenile ID skills!  It is one thing to say Juvenile Lesser Black Backed Gull or Juvenile Herring Gull, but explaining why requires reading up.  

This Juvenile was darker than the other Herring Gull Juveniles and I would have just said Lesser Black Backed Gull, but some Herring Gulls are considerably darker than others.  Most of the books use Dutch and Scandanavian birds as examples and they are very slightly different
Firstly, the Tertial feathers are interesting.  They have a dark center, "with tips edged with white that don't go as far as the greater coverts".  A classic feature of Lesser Black Backed  Gull.  The bill is also classic "dark to the base" although not a defining feature in August.  (By October the Herring Gulls will have developed a lighter base to the bill).  Add the overall appearance of Scales and I reported it as a Lesser Black Backed Gull.  It refuses to fly from where it stood so I never got a wings open shot!  Email me if I got this one wrong!!!

Lesser Black Backed Gull 244:D

A Herring Gull landed near it for comparison.  

August 6th

I went to Broadmeadows, to read some swan rings.  However, I spotted a Black Headed Gull with a white Darvic.  It is from Holland and I have not seen it before. The Dutch are now requesting that sightings are submitted on line.  This I have done and I am now waiting for the sighting to be authenticated.

20/08/2017 Received a nice reply and life history from Date Lutterop in the Netherlands.  EH1Z was ringed last year as a 1CY, so surprised it either wasn't reported last year or wasn't here last year.

Of the 30 Swans read at Broadmeadows, there were none I haven't seen this season.  However, while looking for missing individuals today, I recorded  CAJJ in Coolock, where it was ringed.  It hasn't been seen in over a year and I thought that as it has a deformed bill that it may have perished.  However, it seems to be doing fine.

Mute Swan with under bill and photo of ring. ( It has had deformity since it hatched)
Either of these two could have been my bird of the day, however I stopped at the base of the East wall.  Laods of Terns and Gulls sit out on the railings.  Scanning these more than half were metal ringed.  One metal seemed taller so out with the camera and it was actually a Darvic Ring.  Glad I was able to read it as it was 25m away!
Common Terns

More terns on the railings


Common Tern PZK.  Terns are small birds and their Darvics are tiny!

August 5th

The juvenile large gulls are now appearing every where I look!  This morning at Grand Canal Basin there were two - both Herring Gulls.
Herring Gull 024:D at Grand Canal Basin this morning.  Urban Chick

Herring Gull 061:D at Grand Canal Basin.  Urban Chick

Bullock Harbour + Red Ring Herring Gull 130:D
 However my bird of the day was a metal ringed black headed gull from Sweden!  6214578 has been a regular since I started ring reading in 2012.  Having hatched in 2005 it is now 12 years old and doing well.


August 2nd


Today in Sean Walsh Park there were two Black Headed Gulls with Metal Rings!  This confused me at first.  There are good numbers present on some days but these are mainly birds passing through.  New Black Headed Gull today EW55882.  A BTO ring so it could be from anywhere in Ireland or the UK.  The second gull ended in 6943, I hope it stays around for another day so I can read the rest of the ring!



No comments:

Post a Comment