Wings look longer and fuller as wing feathers grow. (photos from the National Aviary falconcams at Univ of Pittsburgh and the Gulf Tower and by Kimberly Thomas). Your email address will not be published. Chicks “ledge walk” off camera and might not return to the nest at night. Chicks move off nest scrape and walk around on tarsi, sleep and eat. At 25 days: Begins to stand and walk on feet, still rests on tarsi. Rectrices (tail) feathers begin. At Hatching:  35-40 grams, feeble, damp, pink, sparse down, eyes closed except when begging, open eye is slit-like. It’s been fantastic seeing the chicks grow & starting to peck and nibble At 30 days: Half down, half feathers. Contour feathers visible on wing edges. Chicks beg loudly and snatch incoming food from parents. Peregrine Chicks Week-to-Week Development. 39 days and one lone chick – adult left it with a carcass at about 5pm and flew of again – Peregrine chicks make their first flight, approximately Day 40. Canadian Peregrine Foundation. At 20 Days: Heavy down. I was delighted to find your blog with informative description of chick development and marvellous photos (particularly fledglings sitting wobbly on the ledge!) The youngest chick is obvious because it has more down. At 12 Days:  Ear is distinct. Before the end of summer they leave home forever. Youngest chick is alone on the nest as the others walk away. It’s been fantastic seeing the chicks grow and starting to At 28 Days (4 weeks): Body feathers give the chicks a speckly look that camouflages them on the nest. Sleep in a pile. Required fields are marked *, “Outside My Window” If you wish to use a photo please leave a comment with your request. In the coming week they will fly from ledges that cannot be seen on camera. Some of the Here are illustrations of their weekly development using photos of peregrines at the University of Pittsburgh’s Cathedral of Learning and the Gulf Tower in Downtown Pittsburgh. At 35 Days (5 weeks): Chicks are brown and cream colored with some down patches on wings, on top of head and on “pantaloon” legs. After they fly they are permanently off camera. Your email address will not be published. At 14 Days (2 weeks): Second down is long and fluffy. peck and nibble on bits of carcass holding it down with The adult peregrines are They beg loudly. The photos below chronicle the development of a peregrine falcon chick from hatching through to At 27 days: Regularly walks on feet rather than tarsi. Mimi. Peregrine falcon chicks change rapidly as they grow from hatch to fledge in approximately 40 days. No second down yet. Chicks now perch and flap wings for exercise. The oldest males fledge first, then the females and youngest. Parents perch out of reach above the nest. They sit like white Buddhas. All Rights Reserved. var curdate = new Date() In the week ahead their feathers will grow rapidly, pushing out the down which they will pick off as they preen. At 6 days: Second down begins on wings (humeral and alar tracts, dorsal surface of wing). Thanks for this terrific outline replete with visual aids! terrific parents – ever watchful and supplying a constant source of food. The photos below chronicle the development of a peregrine falcon chick from hatching through to fledging. The adult peregrines are terrific parents – ever Some of the prey seem bigger than pigeons! Chicks open wings and run across gravel surface. document.write(year) // End --> Note that while these photos represent a fairly typical progression of … seemingly inappropriate enormous claws! “That delay allows them to cool down, and once she reheats them to body temperature, that sets off the biochemical reactions that lead to the development of a chick. (All primary and secondary feathers still blood-rooted and growing.) I have them on my window and they seem to grow very fast ? Note that while these photos represent a fairly typical progression Photos on this blog are used by permission and are copyrighted material. via the Kodak Birdcam and reproduced here with the kind permission of Click on each photo below for an enlarged view and comments on the changes in the chick, © var year = curdate.getFullYear() The young stay with their parents for part of the summer while they learn to hunt. I’m fascinated by it. Hi Kev, At 5 days: Weight has doubled since hatch day, sits up, open eye is round. Face is pronounced. At 15 Days: Sits upright, alert. Chicks have not left the nest surface yet. Gets a “face.”.