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A Field Guide to Animal Tracks by Olaus Johan Murie

By Olaus Johan Murie

If you happen to personal just one animal song box consultant - personal this one.

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While not much color is visible in dim light, the retinas of megabats also contain cones that, when activated by brighter light, enable them to see some color. Until recently, it was thought that only megabats have color vision, but new research suggests that some bats in the microbat family Phyllostomidae are able to make distinctions between red and green. Question 7: Why do bats have big ears? Answer: Not all bats have big ears; in fact, the ears of megabats are relatively small and simple. They use their acute hearing to listen for predators and to communicate with one another, but they rely mainly on vision and smell to find the fruit or nectar that they eat.

Some colonies include just a few individuals, and others include dozens, hundreds, thousands, or even millions of bats. Some colonial species cluster together, which means they roost close to one another so their bodies touch, while others roost slightly separated from one another. Indiana bats (Myotis sodalist) form groups of less than a hundred under tree bark in the summer, but roost in clusters of thousands in caves during the winter. In the summer, a few tri-colored bats (Perimyotis subflavus) can be found roosting together in leaves, or they can be found roosting in groups of up to thirty in buildings.

D. ) BAT LI FE 37 Most of the remaining species are nectivorous (nectardrinkers), or they are frugivorous, meaning they are fruit-eaters, sometimes also eating leaves or flowers. Bats pluck fruit from a tree with their mouth, sometimes with the aid of their wings and even their feet. If they carry the fruit away from the tree to eat it, they drop large seeds away from the parent plant, and if they eat fruit with small seeds, the seeds pass through their digestive system, where enzymes help the seeds to germinate when they fall to the ground in the bats’ droppings.

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