Observant cam watchers first noticed a possible pip in one of the eggs at 7:56 AM, and then this was confirmed at 8:14 AM.
A pip or tiny hole in the egg is the first indication that hatching is underway. John Blakeman gave us some great information on pipping and hatching back in 2010, so let's do a review! I added a couple of images by way of explanation, but these are not of hawk eggs or eyasses.
"We all expect just a wonderful experience as we witness the hatching, with the first indication being that pipping has begun. Pipping is when the little eyass inside the egg begins to thrust its beak out at the end of the egg and will create a small crack. That’s pipping, the cracking of the egg, and it’s very important.
With a rounded bill, it would be otherwise very hard for the little eyass to poke any sort of hole through the egg shell. But the slightly pointed egg tooth will allow the weak eyass to accomplish this.
For most of a month, her lungs have been filled with fluids, and she’s been breathing very moderately through simple air diffusion into her body tissues. But in the last week or so, things start drying out inside the egg and slowly her lungs will get filled with the gases in the end of the shell. It’s still 100% humidity in there, and all is well.