This video from the USA about red-tailed hawks says about itself:
27 March 2014
Big Red has been vocalizing for quite a long time, Ezra is perched atop Bradfield Hall but we cannot tell whether or not he is answering. Soon BR decides that the conversation is over and takes flight from the nest. Ezra then leaves Bradfield & takes over incubation duties on the nest. What a team they make!
From the Cornell Lab of Ornithology in the USA:
Guess When the Hawks Will Hatch!
With three warm eggs and a fortified stick nest, Big Red and Ezra are making steady progress toward hatching out a new set of nestlings in the next week. Red-tailed Hawk eggs usually take between 28 and 35 days to hatch, but the last two years the Cornell hawks incubated for longer durations: 38 days in 2012 and 39 in 2013. This year’s first egg was laid on March 19 at 1:11 P.M. EDT and this Friday, April 25, would be the 37th day since the first egg was laid, but it’s a new year and anybody’s guess when the eggs will begin hatching.
To add to the excitement of watching new life enter the world, we’re running a contest to see who can guess the hatch date and time of the first egg to the closest minute. “Hatch” for the purposes of the contest involves the first time that a chick’s complete head is visible and the cap is off the egg. The winner will receive a Cornell Lab starter kit (including a special edition Bird Cams notepad, thermal cooler, tote bag, coffee mug, journal and pen, plus a microfiber lens cloth cleaner), and everyone who enters can download a wallpaper closeup image of Big Red. Good luck!
Thank you for watching!