This February 2017 video is called 10 Interesting Facts About Sloths.
From the Senckenberg Research Institute and Natural History Museum in Germany:
Giant sloth was vegetarian: Diet of fossil Megatherium decoded
April 18, 2017
Summary: Scientists have examined the diet of the extinct Giant Sloth Megatherium. Based on analyses of the collagen in the fossil bones, the researchers concluded in their study that Megatherium subsisted on an exclusively vegetarian diet. Until recently, there had been much speculation about the food habits of these elephant-sized, ground-dwelling animals.
Together with an international team, Senckenberg scientists examined the diet of the extinct Giant Sloth Megatherium. Based on analyses of the collagen in the fossil bones, the researchers concluded in their study, which was recently published in the scientific journal Gondwana Research that Megatherium subsisted on an exclusively vegetarian diet. Until recently, there had been much speculation about the food habits of these elephant-sized, ground-dwelling animals.
Sloths may well rank among the world’s most peculiar animals: With their backs pointing downward, they hang in trees and move in slow motion from branch to branch with the aid of their sickle-shaped claws. “Sloths already occurred 10,000 years ago, for example the species Megatherium,” explains Professor Dr. Hervé Bocherens of the Senckenberg Center for Human Evolution and Palaeoenvironment at the University of Tübingen.
The extinct relatives of the sloths could reach the size of an elephant and were much too heavy to spend a significant amount of time in the trees. Instead, they lived on the ground, where they excavated large burrows. For many years, their dietary habits were an enigma; the long claws on their hands and feet, in particular, gave rise to various speculations. Did the sloths use their claws to dig up subterranean insect colonies? Did the long claws serve as hunting tools, and were the giant animals carnivores? Or did the fossil representatives live on a strictly vegetarian diet, like the recent sloths? “These questions were at the center of our new study,” adds Bocherens.
Normally it is possible to deduce the feeding habits of fossil animals on the basis of the shape and wear of their teeth – however, the teeth of the Giant Sloth are not comparable to those of modern animals. “We therefore had to use a different method, so we measured the composition of carbon isotopes – the ratio of protein and mineral content – in the fossilized sloth bones,” explains Bocherens, and he continues, “Our measurements show that Megatherium lived on an exclusively vegetarian diet.”
In carnivores, the proportion of proteins is significantly higher than in herbivores, which primarily eat food high in carbohydrates. These differences can be documented in the isotopes. In order to reinforce their results, the scientists compared their data with more than 200 bones from modern mammals, whose diet is known, as well as with fossil specimens from both carnivores and herbivores. “Our results show that by using this method, it is possible to reconstruct the feeding habits of animals even several thousand years after their death,” adds the biogeologist from Tübingen.
Knowledge of the sloths’ feeding habits is important in order to understand their role in past ecosystems. “Moreover, the results can help us understand the interactions between Megatherium and the first human inhabitants of America – their habitats overlapped for several thousand years, before the Giant Sloth became extinct,” offers Bocherens as a preview.
Pingback: Cenozoic animals, how big, video | Dear Kitty. Some blog
Pingback: Pliocene big marine life extinction discovered | Dear Kitty. Some blog
Pingback: New giant sloth species discovery in Mexico | Dear Kitty. Some blog
Pingback: Extinct Caribbean mammals | Dear Kitty. Some blog
Pingback: Top 10 newly discovered species for 2018 | Dear Kitty. Some blog
Pingback: What pterosaurs ate, new research | Dear Kitty. Some blog
Pingback: Pleistocene giant North American animals | Dear Kitty. Some blog
Pingback: South American rodent evolution, new study | Dear Kitty. Some blog
Pingback: Sloth evolution, video | Dear Kitty. Some blog
Pingback: Extinct Miocene giant animals of the Amazon | Dear Kitty. Some blog
Pingback: Giant sloth fossil discovery in Belize | Dear Kitty. Some blog
Pingback: Saber-toothed cats, other La Brea, USA fossils | Dear Kitty. Some blog
Pingback: Prehistoric puma feces reveals oldest parasite DNA | Dear Kitty. Some blog
Pingback: Ice Age North American big mammals’ extinction | Dear Kitty. Some blog
Pingback: Rattlesnakes of Arizona, USA | Dear Kitty. Some blog