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Researchers who captured footage of dog attacks on endangered mountain tapirs in Colombia are calling for action to protect threatened wildlife.

"Animals like sloths and armadillos came north, while horses, tapirs, bears and elephants went south," said study co-author Bruce MacFadden, curator of vertebrate paleontology at the Florida Museum of Natural History.

Their phones were now full of oncillas, tapirs, great horned owls and the gleaming crowns of Mauritius palms at sunset.

This may also explain why other animals with trunks, such as tapirs, never developed such dextrous trunks as elephants, as they never moved into open lands.

Titanotheres belong in the order Perissodactyla, along with rhinoceroses, tapirs and horses.