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04 July 2012

Robins: 4 Eggs, 4 Weeks

This is for the ISOCS classes who will be investigating life cycles next year, and for the Middle Primary class last year, who were investigating survival:

Robins: 4 Eggs, 4 Weeks from Fred Margulies on Vimeo.

"A robin built a nest in a hanging basket on our porch and laid 4 eggs. That kept mom and dad busy for the next four weeks. Here's what happened."

You can read about the American Robin at Wikipedia: The Robin "normally has two to three broods per breeding season, which lasts from April to July."

"A clutch consists of three to five light blue eggs, and is incubated by the female alone. The eggs hatch after 14 days, and the chicks leave the nest a further two weeks later. The altricial chicks are naked and have their eyes closed for the first few days after hatching. While the chicks are still young, the mother broods them continuously. When they are older, the mother will brood them only at night or during bad weather.
The chicks are fed worms, insects, and berries. Waste accumulation does not occur in the nest because adults collect and take it away. Chicks are fed, and then raise tails for elimination of waste, a solid white clump that is collected by a parent prior to flying off. All chicks in the brood leave the nest within two days of each other. Even after leaving the nest, the juveniles will follow their parents around and beg food from them. Juveniles become capable of sustained flight two weeks after fledging."  (link)
Not a time lapse in the usual sense, this video gives us a wonderful, easy to understand grasp of birds from egg to adulthood.  You wonder how the adults manage to feed the ever increasing size of each brood, and also feed themselves...and they do this 2 or 3 times a year! What it takes for a species to ensure survival!

How was the camera attached to capture the view into the nest?  How was it activated to film when the adult arrived with a juicy worm?  How much footage was edited out? Would the video be more interesting without the music, and only the natural sounds?