Vampire Bats have developed a taste for human blood and our participation in environmental changes might have something to do with it. These creatures were thought to feed exclusively on that of large birds, but for the first time traces of human blood has been found.
In studies conducted in the past, it was discovered that these bats would only prey on large birds at night, taking in a teaspoon of blood as one meal. It was even tested that when only pigs and goats were available, the bats opted to fast or even starve.
So what’s changed now that is causing bats to seek out other forms of prey including us? Well, it’s all the environmental changes caused by—you guessed it—humans. There are several humans living in the same area as the park and this may have caused the bats to have to explore their options as the humans moved in, and the birds moved out.