Nest 1A: more on the ringing

The nestcam suggested the four chicks on Nest 1A were in good condition. Examination by the licensed ringer, the Kielder ornithologist, and weighing the chicks showed the camera did not lie! We found more evidence of YA’s abilities as a provider, and Mrs YA’s determination to distribute food equally because none of their offspring showed any sign of “fault bars”. These are the feather markings that would have indicated periods of restricted growth when the chicks were younger.

Chick 1 is now Blue Y0 and weighed 1730 grams. She was assessed as female.

Y0 poses (c) Paul McMichael

Blue Y0 poses
(c) Paul McMichael

Y0's well developed wing (c) Joanna Dailey

Blue Y0’s well developed wing
(c) Joanna Dailey

She was very interested in proceedings!

Y0 checks out the rings (c) V J Paine

Y0 checks out the rings
(c) V J Paine

When it came to applying the glue to seal the Darvic colour ring she took a bite out of the tube! Back in her nest she showed off her new colour ring.

Best foot forward from Blue Y0 (c) Paul Pickett

Best foot forward from Blue Y0
(c) Paul Pickett

Chick 2 was next to be assessed. He weighed 1430 grams, a reasonable weight for a male. He wears Darvic ring Blue Y1.

Blue Y1 (c) Joanna Dailey

Blue Y1
(c) Joanna Dailey

He also posed happily when back ‘home’.

Blue Y1 makes himself look large (c) Paul Pickett

Blue Y1 makes himself look large
(c) Paul Pickett

Chick 3, also thought to be male, weighed 1500 grams. He is now known as Blue Y2. He was not keen to pose!

Blue Y2 keeps a low profile (c) Joanna Dailey

Blue Y2 keeps a low profile
(c) Joanna Dailey

Finally chick 4, who looks quite small on the nestcam, weighed in at 1700 grams. Yes, 1700, it was double checked! At this stage of their development more of the energy contained in food goes into feather production and less into skeletal mass. Because of this any visual judgement of chick size has to be confirmed by careful weighing and measuring.
Chick 4, a female, is now Blue Y3.

Blue Y3 in stare mode (c) Paul Pickett

Blue Y3 in stare mode
(c) Paul Pickett

Even more up close!

I've got my eye on you! (c) Paul Pickett

I’ve got my eye on you!
(c) Paul Pickett

Many thanks to Paul Wildlifewriter for technical assistance and input to the draft.

This entry was posted in Osprey updates, UK and tagged . Bookmark the permalink.

3 Responses to Nest 1A: more on the ringing

  1. JW4926 says:

    What fabulous pics – Thank you Joanna and Paul :-) and to think I was worried about Chick 4 … :-)

  2. Mike Simmonds says:

    Superb pictures and once again a comprehensive account. The ‘fault bars’ indicator was mentioned by Roy Dennis in an interview when ringing the LG chicks. The comment about feather production versus skeletal mass was new to me and does indeed help to explain how we ‘viewers’ can get the wrong impression. Thank you. We live and learn.

  3. Jacqueline Jacques says:

    Stunning photographs. Such beauty and power.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s