Vampire bats are active at night; it is the best time to avoid predators such as the owl. It is also easier for
the bat to sneak upon a domestic animal to feed. When the animals are asleep it is easier for vampire bats
to go undetected. But when there is light out, in the daytime the vampire bats hang upside down in their
caves or hollow trees. Sometimes they will move to other roost areas closer to their prey, it shows that
vampire bat have intelligence from experience. Vampire bats use rivers as navigation tools because they
are easy to follow, also, the prey go there to graze.
The vampire bat feeds on the blood of animals, their favorite are cows, pigs and horses. The bats
normally choose to feed on the isolated animals in the herd. The bats have incisors that slit holes into the
areas that have veins running close to the surface such as the neck or shoulder. With special saliva, the
blood keeps a constant flow into the bats mouth. The bat may drink for as many as 2-3 minutes. Two or
more bats may feed on the same wound. The host usually never has an ill effect from loss of blood
although, if many bats feed on the same host, it may be weakened.
A bat gives birth to a single offspring after an unusually long gestion period of six to eight months.
The baby bat is born blind and is carried by the mother for a few days after birth until it opens its eyes,
usually a week later. The young bat after nine months would of already matured sexually, and may breed at
any time after that.
Vampire bats can carry rabies transfering it to livestock and man. People have injected
anticoagulants into the livestock, not harming the stock but harm the bats. The bats get the anticoagulants
and carries it back to the roost where other bats will get infected and die. The anticoagulants cause internal
bleeding.