Apr 21 2010

I see a pip

Published by at 6:20 am under Peregrines

It looks to me like the egg at top right has a pip in it.  See the dent? 

This photo is from last evening at 7:50pm, so perhaps this egg will hatch today.   

(photo from the National Aviary webcam at University of Pittsburgh)

16 responses so far

16 Responses to “I see a pip”

  1. Jennieon 21 Apr 2010 at 6:43 am

    Thanks for the wonderful photo. Just added another word to my vocabulary.

  2. Donnaon 21 Apr 2010 at 8:07 am

    Kate, Are your great photos from the still camera at COL? The streaming camera does not seem to give such vibrant colors. Is there some way for us to see the archived stills? Thanks for everything you do!

  3. Kate St. Johnon 21 Apr 2010 at 8:58 am

    Yes, these are photos from the snapshot camera at http://aviary.org/cons/FalconCam/Cathedral_refreshCam.php

    It does motion detection archiving but the archives are not publicly available.

  4. Carlana Rhotenon 21 Apr 2010 at 11:13 am

    what’s with this violent rubbing of the eggs? Is that what happens? Also, what happens when there is a hatchling ? But there are still eggs to hatch. Do they sit on the hatchling too?

  5. Kate St. Johnon 21 Apr 2010 at 11:30 am

    The mother bird gets increasingly restless as the eggs are hatching.

    The baby bird inside the egg hits the shell from inside using his “egg tooth” — a knob on the top of the beak that exists for this task. The chick hits the shell, then turns inside the egg and hits the next spot. This makes something like a dotted line and the blunt end of the shell eventually comes off whole.

    The mother bird waits for this to happen and looks under her chest to see how it’s going. The chick must free itself.

    Peregrine chicks cannot regulate their body temperature until they are about a week old so they must be brooded by the adult. This is just like incubation except the babies are out of the eggs.

  6. Danielon 21 Apr 2010 at 11:49 am

    This is truly fascinating to watch!

    So I’m used to watching birds like robins and jays learn to fly. Usually when I witness this their first flights are awkward flutterings toward the ground – and if they’re lucky they snag a branch on the way down – making short flights between branches for a few days to strengthen their skills.

    How does this work in peregrines?! Do they have to really fly on that first jump? Or is there room up on the cathedral to flitter around and get some wing strength first? Or, alternatively, is their first flight delayed longer than birds closer to the ground to allow them to get good wing strength/endurance?


  7. Kate St. Johnon 21 Apr 2010 at 12:04 pm

    First flight is delayed. They spend a lot of time in the nest before they are big enough to fly.

    My Peregrine FAQ page has answers to many of your questions at http://www.birdsoutsidemywindow.org/peregrine-faqs/ Fledging is addressed in the last link in the Appearance & Behavior category.

  8. Danielon 21 Apr 2010 at 6:56 pm

    Thank you so much for the info. I love the FAQ as well!

    One other quick question…Dorothy really seems to love picking at the gravel. Is this just her restlessness again? Relieving boredom? Or does it serve some other purpose. It doesn’t really look like she’s grooming the scrape. I’ve seen her pick up rocks and just drop them several times – like a bird equivalent of twiddling thumbs. Or maybe that’s too much anthropomorphizing.

  9. Kate St. Johnon 21 Apr 2010 at 8:05 pm

    Funny you should ask that. Yes, she is puttering but there can be more to it than that. I wrote an FAQ about it: http://www.birdsoutsidemywindow.org/peregrine-faqs/question-is-she-eating-rocks/

  10. Danielon 21 Apr 2010 at 8:13 pm

    doh – sorry I missed that one in the FAQ. I did read quite a lot of it today 🙂

  11. Lisaon 21 Apr 2010 at 10:37 pm

    It is 10:30pm and I am watching the COL nest. I really think I hear a baby, or babies, chirping! Is that possible? None have fully hatched though at this point, still seeing all 5 eggs.

  12. Kate St. Johnon 21 Apr 2010 at 10:56 pm

    I haven’t heard them but you may have. At this stage the chicks can make noise while inside the eggs. Very high peeps.

  13. Tracion 21 Apr 2010 at 11:16 pm

    I thought I heard this as well!! So glad someone else did. I heard it until one or the other parents got on the eggs – so I thought maybe it was my imagination.
    Having sound is fantastic!!

  14. Mary DeVon 21 Apr 2010 at 11:23 pm

    FIRST BABY! 22:20 April 21! (in “archive” time)

  15. Sophiaon 21 Apr 2010 at 11:24 pm

    The first egg has definitely hatched! The chick is so cute! ^^

  16. Mary DeVon 21 Apr 2010 at 11:25 pm

    Correction, 23:20 — too excited to type 🙂

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