Download Bats : a world of science and mystery by Fenton, Melville Brockett; Simmons, Nancy B PDF

By Fenton, Melville Brockett; Simmons, Nancy B

There are greater than 1,300 species of bats - or virtually 1 / 4 of the world's mammal species. yet prior to you diminish in worry from those bushy "creatures of the night," give some thought to the bat's basic position in our surroundings. A unmarried ten-gram bat could consume a number of thousand bugs in an evening. during the tropics and subtropics, fruit and nectar-feeding bats also are an important to the lives of crops, offering both Read more...

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There are greater than 1,300 species of bats - or nearly 1 / 4 of the world's mammal species. yet sooner than you scale down in worry from those hairy "creatures of the night," examine the bat's fundamental Read more...

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The tragi are small in Slit-faced Bats (Nycteridae) and Free-tailed Bats (Molossidae). Other parts of the ear may serve the function of the tragus in echolocation. ) Chapter 1: It’s a Bat! 31 The Diversity of Bats Most areas of the world support many species of bats, each of which has a slightly different anatomy and lifestyle. Most bat species occur in tropical and subtropical regions, meaning that countries closer to the equator tend to have more species of bats than countries in northern (or southern) temperate regions.

When the opening is smaller than the bat’s wingspan but large enough to admit its body, the bat flies directly at the opening and, just as it arrives, tucks up its wings and dives through. If a mischievous experimenter puts fine threads across the opening, the bat bulls its way through. When fine wires rather than threads obstruct the opening, the bat looks elsewhere for a way out. These observations represent impressive demonstrations of flight performance and control, as well as of the sensory abilities of bats.

White and Purple arrows show enlargements (B and C) of areas on the skulls (A and D). Fossil bats like Palaeochiropteryx and Icaronycteris show clear evidence that they were echolocators. With the help of x-rays and CT scans, Nancy and her colleagues have been able to “see” into the skulls of these animals and measure the relative size of their cochlea. Stylohyal elements are likewise preserved in some specimens. Skeletal features of mammals can be very revealing about the habits of these animals.

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