By Melissa C. McDade
Grzimek's pupil Animal existence source: Birds bargains readers accomplished and easy-to-use info on Earth's birds. Entries are prepared by means of taxonomy, the technological know-how during which residing issues are categorized into comparable teams. each one access comprises sections on actual features; geographic diversity; habitat; vitamin; habit and copy; animals and folks; and conservation prestige. kinfolk entries are via a number of species debts and a variety map and picture or representation for every species. Entries finish with an inventory of books, periodicals, and websites which may be used for additional learn.
Each quantity of Grzimek's pupil Animal existence source: Birds encompasses a pronunciation advisor for clinical names, a thesaurus, an outline of birds, an inventory of species within the set via biome, a listing of species by means of geographic place, and an index. The set has 640 full-color maps, pictures, and illustrations to brighten up the textual content, and sidebars offer extra proof and comparable information.
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Additional resources for Birds
They have powerful chest muscles that move their wings. The wing and tail feathers are tough, and birds can turn some of them for steering. A bird usually shuts its wing feathers to trap the air as its wings go down. This lifts the bird into the air and pushes it forward. Then, as it raises the wings, it fans the feathers open to let the air through. How birds fly depends somewhat on the shape of their wings. Vultures and seabirds have long, narrow wings that are great for soaring high on air currents or gliding over the ocean.
Secondary forest: A forest characterized by a less-developed canopy, smaller trees, and a dense ground vegetation found on the edges of fores Sedentary: Living in a fixed location, as with most plants, tunicates, sponges, etc. Contrast with motile. Semi-precocial: To be born in a state between altricial and precocial. Semi-precocial chicks can usually leave the nest after a few days. xxxvi Grzimek’s Student Animal Life Resource Sequential polyandry: A mating system in which a female mates with one male, leaves him a clutch of eggs to tend, and then mates with another male, repeating the process throughout the breeding season.
Fry, and S. Keith. The Birds of Africa, vol. 5. London: Academic Press, 1997. Weidensaul, Scott. Birds: National Audubon Society First Field Guides. New York: Scholastic Trade, 1998. 1122 Grzimek’s Student Animal Life Resource AUSTRALIAN ROBINS Petroicidae Class: Aves ▲ Order: Passeriformes Family: Petroicidae Number of species: 35 species family C H A P T E R PHYSICAL CHARACTERISTICS Australian robins are small, plump birds with large heads and short tails. They have long legs and strong feet, which allow the birds to have an upright stance.
Birds by Melissa C. McDade