A Field Guide to Mammals: North America north of Mexico by William H. Burt

By William H. Burt

Descriptions of 380 species contain measurement, weight, colour, markings, variety of enamel, habitat, conduct, and comparisons with related species. remarkable colour illustrations and line drawings exhibit 230 animals. diversity maps in addition to pictures of skulls and drawings of animal tracks, dens, nests, and burrows around out the wealth of data given in "the top basic consultant to all of North America" (Peter Warshall, complete Earth Review).

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Extra resources for A Field Guide to Mammals: North America north of Mexico (Peterson Field Guides)

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The tarantula sits quietly, hidden in the dark, and then springs upon its victim. It grasps the prey with its two pedipalps (special appendages located near the mouth), and enfolds it with its eight legs and then bites it, injecting its venom. Tarantulas cannot digest food inside their own bodies; the venom they inject must serve two purposes. First, it stuns the prey into submission, and then it begins to digest the animal, turning its insides to liquid proteins and fats. The tarantula then sucks out the predigested liquid.

Mona yellow–shouldered blackbirds are found on Mona Island, which lies between Puerto Rico and Hispaniola (the island divided between Haiti on the west and the Dominican Republic on the east). These birds nest on the ledges or in the 278 Endangered Species, 2nd Edition crevices of sheer coastal cliffs. Their population numbers between 400 and 900. History and conservation measures The Puerto Rico yellow–shouldered blackbird was once abundant throughout coastal areas of Puerto Rico. It was found in various habitats, including freshwater wetlands, open woodlands, and fields.

In 1929, only 1,400 birds remained in existence. In 1939, there was a volcanic eruption on Torishima, which buried much of the habitat. By the end of World War II (1939–45), the short–tailed albatross was feared extinct. Then, in 1951, a tiny colony of ten birds was discovered on Torishima. Japanese biologists (people who study living organisms) and conservationists (people who work to protect the natural world) worked hard to save the short–tailed albatross. The Japanese island breeding habitat is protected, and it has been improved with new plantings and the elimination of feral animals (domestic animals that have become wild).

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