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The female lays a single soft-shelled, leathery egg 22 days after mating, and deposits it directly into her pouch. An egg weighs 1.5 to 2 grams (0.05 to 0.07 oz) [21] and is about 1.4 centimetres (0.55 in) long. While hatching, the baby echidna opens the leather shell with a reptile-like egg tooth. [22]
The order Artiodactyla consists of 349 extant species belonging to 132 genera. This does not include hybrid species or extinct prehistoric species. Modern molecular studies indicate that the 132 genera can be grouped into 23 families; these families are grouped into named suborders and many are further grouped into named clades, and some of these families are subdivided into named subfamilies.
Tylopoda (camels, llamas, and alpacas) and chevrotains have three-chambered stomachs, while the rest of Ruminantia have four-chambered stomachs. The handicap of a heavy digestive system has increased selective pressure towards limbs that allow the animal to quickly escape predators. [35]
Usually traveling at speeds up to 6.2 mph but capable of swimming nearly 15 mph, emperor penguins can travel as far as 621 miles on a foraging trip. Reproduction and Nesting Emperor penguins breed ...
The platypus has frequently appeared in Australian postage stamps, most recently the 2015 "Native Animals" series and the 2016 "Australian Animals Monotremes" series. [ 141 ] [ 142 ] In the American animated series Phineas and Ferb , the title characters own a pet bluish-green platypus named Perry who, unknown to them, is a secret agent.
During the course of evolution, the monotremes have lost the gastric glands normally found in mammalian stomachs as an adaptation to their diet. [37] As such, by some definitions, they do not have stomachs as an organ, [38] although the term is widely used in studies of monotreme anatomy. [39] [40] Monotremes synthesize L-ascorbic acid only in ...
Spanning an impressive 111 feet (34 meters) in width, 105 feet (32 m) in length, and standing 18 feet (5.5 m) tall, this colossal organism — so large it’s even visible even from space ...
(from Wiedersheim's Comparative Anatomy) Food digestion in the simple stomach of nonruminant animals versus ruminants [21] The primary difference between ruminants and nonruminants is that ruminants' stomachs have four compartments: rumen—primary site of microbial fermentation; reticulum; omasum—receives chewed cud, and absorbs volatile ...