The resident Peregrine Falcons at my work site are once again proud parents this year. Yesterday, two hours into a 16 hour shift, I was able to photograph the nestlings. Here is a link to the Canadian Peregrine Foundation's Daily Development Age Guide. http://www.peregrine-foundation.ca/info/ageguide.html .
As close as I can tell the chick in front is about 26 days old and its siblling probably 28 days old. If you check out the daily changes at the aforementioned link, you'll see how rapidly they progress day-to-day. In fact, by 37 days they should be ready to fly. I was tempted to try to photograph them again this morning 14 hrs after this photo was taken to see if they changed overnight.
Here are some other photos I've taken at work since my last blog post.
This next ID is a little tricky but if you read his lips you may get it.