Hatch in progress at Great Spirit Bluff!
April 7, 2020: Pip at GSB
We have hatch in progress at Great Spirit Bluff! Nova’s eggs have been tricky this year since (at least) one egg has some ‘Is that a pip?’ markings on the skinny side, but the obvious punctures on this egg’s thick side signify hatch! Why do we look for pip at the blunt or the thick side of the egg? After hatch begins internally, but before we see it externally, hatchlings pierce the embryonic membrane, stick their beaks into the air cell at the blunt or large end of the eggs, and begin to breath with their lungs. Parents vocalize to their hatchlings, which begins the imprinting process prior to hatch, and young often vocalize back. Listen for a little ‘egg talking’ starting at 1:42 in the video below, although you might need to turn up the volume to hear it.
Ethologically, egg-talk could be described as a fixed action pattern: an instinctive behavioral sequence that is highly stereotyped and species-characteristic. Putting it in modern terms, wouldn’t you vibe back at a voice you vibed with?
To watch live, go to https://www.raptorresource.org/birdcams/gsb-falcons/ or https://explore.org/livecams/raptor-resource-project/peregrine-falcon-cam.