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There are nearly 1,000 species of bats world wide.
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Lesser long-nosed bats (Leptonycteris curasoae, or Leptos
for short) are featured on Journey North's site. are found in the dry
portions of the tropics of Mexico and El Salvador. During the summer
, these bats are also found in the southern parts of Arizona and New
Mexico. (You can make your own Lepto
Range Map.)
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Lesser long-nosed bats (Leptonycteris curasoae, or Leptos
for short) live in caves and mines in groups of 5-50, up to as many
as 100,000 individuals.
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In
1988, Leptos were listed by the U.S. Fish and Wildlife Service
as Endangered. Roost disturbance
and possible effects
of habitat loss
(such as the over-harvesting of agaves in Mexico) represent the primary
threats for these bats."
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In
the summer months of June and July, female Leptos aggregate in "maternity
colonies." There they give birth and raise their young. Mother
bats stay with their young until they are able to fly and forage
on their own. We still have very little information on what the males
do and where they roost. Biologists have found many more females
than
males in cave and mine roosts.
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Leptos (lesser long-nosed bats) are nectivorous and frugivorous,
meaning they eat nectar and fruit. While they sometimes eat insects,
like most of the bats you probably know, in the spring time they feed
primarily on the nectar found in flowers.
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When bats run out of a local food source, they can either migrate
to another area that has food availbale or they can hibernate if the
food resource really disappears (as happens in temperate regions).
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Of the bats that hibernate, many of them MIGRATE to the place where
they hibernate. In some cases, that's hundreds of miles.
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Lesser long-nosed bats (Leptonycteris curasoae, or Leptos
for short) are not capable of hibernating because they cannot lower
their body temperature to go into the torpid state required for hibernation.
(Many bats in the New World are capable of extended torpor, but lesser
long-nosed bats are not among them.) Besides running our of food in
the orthen part of its range (the Southwest U.S.), leptos face the
hardship of lower ambient temperatures. They don't have the metabolism
to be able to survive long periods of cold.
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No bats are blind. Most can actually see quite well.
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Bats do not become tangled in human hair. their sonar, or echo-location,
abilities are far more sophisticated than human-made technologies and
allow bats to navigate flawlessly in even pitch darkness.
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Bats are no more likely to transmit disease to other animals or to
humans than your pet dog. Bats are not vermin or rodents.
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Bats are important contributors to global environmental health. A
single little brown bat can catch 600 mosquitoes in just one hour.
A colony of 150 big brown bats can protect local farmers from 18-million
or more root-worms each summer. Tropical bats are key elements in rain
forest ecosystems, which rely on them to pollinate flowers and disperse
seeds for countless trees and shrubs .. . and bats are directly responsible
for over 95% of all rain forest re-growth in cleared areas.
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In the wild, important agricultural plants--from bananas, breadfruit
and mangoes, to cashews, dates and figs--rely on bats for pollination
and seed dispersal.
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Despite their many valuable contributions, bats are among the most
relentlessly persecuted animals on the planet. More than half of American
bat species are in severe decline or already listed as endangered.