Lawrence Peregrines: Day 29

June 2, 2019 in In the Nest Box, lawrence peregrines, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

The Peregrines started the day off under continuing overcast skies, light winds, and temp at 49F.  The forecast calls for a chance of showers before 11am, then a slight chance of showers and thunderstorms after 5pm. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 71. South wind 3 to 7 mph. Tonight, a chance of showers and thunderstorms. Areas of fog between 2am and 3am. Otherwise, mostly cloudy, with a low around 54. South wind 5 to 8 mph becoming west after midnight. 

The chicks have been lazy most of this morning and have huddled in the far left corner.  They take turns getting up, walking around a bit, preening, and then slumping back into the huddle. By day 29, the chicks often have their faces largely free of down, giving them a white-capped appearance.  On their backs, the remaining down often appears to be clumped together in certain areas, with extensive areas instead revealing the dark juvenile feathers, as you see in this photos. The wing and tail feathers are developing strongly and body feathers begin to appear in lines and patches along the back and breast.  Preening becomes a major activity.

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;