Yep, you guessed it, Beauty laid her fourth egg. We got our first clear look at it at 6:43PM. She and Archer have been sitting on the eggs pretty much constantly since the third egg was laid on Monday afternoon. Four eggs is an average clutch size for peregrines, and they usually begin incubating the eggs when the next to last one has been laid, so we’re fairly certain that she’s going to stop at four.
So, when will the eggs hatch? Well, provided that this is, in fact her last one, if we look back to Tuesday the 13th as the start of “hard” incubation, it ought to be 33-35 days from then. In other words, look for hatching to begin sometime around May 16-18. It usually takes a day or two for all of the eggs to hatch, but we should have some new eyases to watch by the third week of May!