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Crocodiles can climb trees

04 September 2014, 09:28

Most people entering crocodile territory keep a wary eye out on water and land, but research suggests they need to look up.

Read Also: Monster crocodile helps stranded Aussie find God

Though the reptiles lack obvious physical features to suggest this is possible, crocodiles in fact climb trees all the way to the crowns, according to University of Tennessee researcher Vladimir Dinets.

Researchers in the climbing study observed crocodiles in Australia, Africa and North America. The study documented crocodiles climbing as high as six feet (1.8 metres) off the ground. But Dinets said he received anecdotal reports from people who spend time around crocodiles of the reptiles climbing almost 30 feet (9 metres).

Dinets said crocodiles lack the toe and foot structure that would be expected of a climber. However, smaller and juvenile crocodiles in particular were observed climbing vertically while larger ones tended to climb angled trunks and branches, all of which is a measure of the reptiles' spectacular agility, he said.

Read Also: Vegetarian crocodiles have better skins

"They just go slowly," he said. "Eventually they get there."

Why do crocodiles climb trees?

The researchers believe the crocodiles climb to keep a lookout on their territory and to warm themselves in the sun.

"The most frequent observations of tree-basking were in areas where there were few places to bask on the ground, implying that the individuals needed alternatives for regulating their body temperature," the authors wrote.

"Likewise, their wary nature suggests that climbing leads to improved site surveillance of potential threats and prey."

Read Also: Crocodile eats boy in PNG

Croc experts have known about this for years

People who spend time around crocodiles have known about the climbing ability for decades, Dinets said, but this study is the first to thoroughly examine the climbing and basking behaviour.

Dinets also was co-author of a widely reported study in 2013 that demonstrated crocodiles used sticks and twigs to hunt, balancing nest-building material on their snouts just above the water line to lure birds. The crocodiles lay in wait for hours and lunged when a bird ventured near.

That finding was the first reported use of tools by any reptile and the first known case of predators timing the use of lures to a seasonal behaviour in their prey, according to a University of Tennessee press release at the time.

- Health24

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