In 1960 it was still killing wildebeest calves in the Serengeti.
Only 22 condors were alive in 1982, due to poaching, habitat destruction, DDT poisoning, and shooting by cattle ranchers who mistakenly believed that the carrion-eating birds were killing young calves.
The detective work was a little nerve-racking, she says, because "you're messing with a big cat's food, … but I loved participating in that study because we found out what was killing the calves".
They also practice infanticide, killing newborn calves of females they have not mated with a reproductive strategy that causes the female to become fertile a few months after losing her calf.
450 Calves to Be Slaughtered WASHINGTON, Jan . 5(AP) -- Federal agriculture officials have decided to kill 450 calves in a Washington State herd that includes an offspring of the cow diagnosed with mad cow disease.
Nonetheless, black bears are strong predators, and in some areas they frequently kill moose calves and deer fawns during spring.
The bear had killed 12 calves during the night'.
While tigers don't usually hunt elephants due to their size, they have been known to kill elephant calves.
"This kills my calves," she says when the music stops.
– It's still cheaper to kill male calves in the dairy industry than to rear them.
