Lawrence Peregrines: Day 17

May 21, 2019 in In the Nest Box, lawrence peregrines, On the Clock Tower, Peregrine Falcons Eastern Massachusetts, Peregrine Falcons Massachusetts

The Peregrines started today off under clear skies, wind from the west at 14MPH, gusting to 22MPH, and temp at 57F just before 6AM.  The day ahead looks like mostly sunny, with a high near 66. Breezy, with a west wind 11 to 16 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 34 mph! Tonight’s forecast calls for mostly clear, with a low around 46. Northwest wind 8 to 17 mph, with gusts as high as 30 mph…a very breezy day ahead.

2019.0521.3By day 17, the chicks have already grown considerably relative to the size of their parents, but still have a long way to go until they match their stature and reach full size.  In terms of feeding, the frequency of feeding visits by the parents depends on the size of the brood, but researchers have found that four meals per day was the norm during the nestling period.  Others have observed anywhere from 4-8 feeding visits per day, with some observing as many as 6-11 feeding visits per day.  Most observers agree that feeding begins very early in the morning, often before it is light enough for humans to see!


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;