Lawrence Peregrines: Day 16

May 20, 2019 in In the Nest Box, lawrence peregrines, On the Clock Tower

The Peregrines started off this morning under overcast skies and light rain, wind from the S at 9MPH, and temp at 66F just before 6MA. The forecast calls for a chance of showers and thunderstorms, mainly after 5pm. Some of the storms could produce small hail, gusty winds, and heavy rain. Mostly cloudy, with a high near 87!! Southwest wind 9 to 15 mph, with gusts as high as 28 mph. Tonight, a chance of showers and thunderstorms, mainly before 9pm. Some of the storms could also produce small hail, gusty winds, and heavy rain. Cloudy during the early evening, then gradual clearing, with a low around 53. West wind 8 to 14 mph. Quite a day ahead!

2019.0521.2Just before 6AM, all was quiet in the nest box. The chicks were huddled in the back left corner, a growing group of loose feathers are collecting in the middle of the nest box around the addled egg, and the female is perched on the pole keeping watch. She bolted in flight and returned minutes later with fresh prey. The little ones were eager for a meal and nibbled at every morsel offered by Mama Bear! Then, all three retreated to the back left corner in a tight huddle.

Around day 16, dark spots can be seen along the edges of the wings, indicating the growth of the flight feathers underneath the covering of down.  The down on the head also begins to take on a “rougher” texture around this time.  As mentioned in a prior post, most of the day is spent sleeping, up to about 16 days, but movements around the nest box become more developed, and they start to become more active during the day.  

Literature cited:

Ratcliffe, D. 1993. The Peregrine Falcon. 2nd ed. Carlton, England: T. and A. D. Poyser.

The Canadian Peregrine Foundation, Peregrine Falcon Development – Age Guide;