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Wood Duck ( Aix sponsa ) Female Incubating Eggs in a Nest Box “Many species of cavity-nesting birds have declined because of habitat reduction. This is the female incubating eggs in the nest box… and a couple of weeks later… then, at the ripe old age of 17 days, what’s going on out here?
Although it was formerly abundant and geographically widespread, Trumpeter Swan numbers and distribution were greatly reduced during the early fur trade and European settlement of NorthAmerica (1600’s to 1800’s), when it was prized for its skins and primary feathers 1. www.youtube.com/watch?v=kq1bx7Ic2FY.
In the mid 1700s, fur-traders began introducing foxes up and down the Aleutian chain, in order to generate some more raw material work with. North American Peregrine Falcons have also enjoyed an impressive population rebound in recent years. Santa Cruz Island, CA. It was thought of as a wonder-chemical, with no ill effects.
They breed in dense colonies, incubate their single egg on the feet, and take more than a year to fledge a chick. Howell’s Petrels, Albatrosses, and Storm-Petrels of NorthAmerica: A Photographic Guide, previously reviewed here. Southern Elephant Seals and Weddell Seals are also resident, though not in such large numbers.
In 1850, the Passenger Pigeon ( Ectopistes migratorius ) was the most abundant bird in NorthAmerica and possibly the world. The Amur Leopard ( Panthera pardus orientalis – above) is just one majestic animal on the Critically Endangered (CR) list with less than 100 individuals in the wild due to hunting for its fur.
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