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"Man's best friend" is a phrase referring to domestic dogs, highlighting their close relations, loyalty, and companionship with humans within many societies. History Before the evolution of wolf into dog, it is posited that Man and wolf worked together hunting game. Wolves were the superior tracker but man was the superior killer, thus wolves would lead man to the prey and man would leave some of the meat to the wolves...

Frogs are amphibians in the order Anura (meaning "tail-less", from Greek an-, without + oura, tail), formerly referred to as Salientia (Latin salere (salio), "to jump"). Most frogs are characterized by a short body, webbed digits (fingers or toes), protruding eyes and the absence of a tail. Frogs are widely known as exceptional jumpers, and many of the anatomical characteristics of frogs, particularly their long, powerful legs, are adaptations to improve jumping performance...

Camouflage is a method of crypsis (hiding). It allows an otherwise visible organism or object to remain unnoticed, by blending with its environment. Examples include a tiger's stripes, the battledress of a modern soldier and a butterfly camouflaging itself as a leaf. The theory of camouflage covers the various strategies which are used to achieve this effect. In nature Cryptic coloration is the most common form of camouflage, found to some extent in the majority of species...

Caplin Rous from Texas is the most famous pet capybara on the planet. He loves travelling and eating ice cream. The capybara (Hydrochoerus hydrochaeris ), also known as capibara, chigüire in Venezuela, Colombia, and Ecuador ronsoco in Peru, chigüiro, and carpincho in Spanish, and capivara in Portuguese, is the largest living rodent in the world. Its closest relatives are agouti, chinchillas, coyphillas, and guinea pigs...

Horseshoe crabs are arthropods that live primarily in shallow ocean waters on soft sandy or muddy bottoms. They will occasionally come on shore for mating. They are commonly used as bait and in fertilizer, and in recent years there has been a decline in number of individuals, as a consequence of coastal habitat destruction in Japan and overharvesting along the east coast of North America. Tetrodotoxin may be present in the roe of species inhabiting the waters of Thailand...

The Savannah is a hybrid domestic cat breed. It is a cross between a serval and a domestic cat. (The first was bred with a Siamese) History Savannah cat is the name given to the offspring of a domestic cat and a serval—a medium-sized, large-eared wild African cat. The unusual cross became popular among breeders at the end of the 20th century, and in 2001 the International Cat Association accepted it as a new registered breed...

The Sand cat (Felis margarita), also referred to as the "sand dune cat", is a small wild cat distributed over African and Asian deserts. (The name "desert cat" is reserved for Felis silvestris lybica, the African wildcat.) The Sand cat lives in arid areas that are too hot and dry even for the African Wildcat: the Sahara, the Arabian Desert, and the deserts of Iran and Pakistan. Victor Loche was the first European to describe the sand cat for science (in 1858)...

The naked mole rat (Heterocephalus glaber), also known as the sand puppy or desert mole rat, is a burrowing rodent native to parts of East Africa and the only species currently classified in the genus Heterocephalus. It is one of only two known eusocial mammals (the other being the Damaraland mole rat) and has a highly unusual set of physical traits that enables it to thrive in an otherwise harsh, underground environment, including a lack of pain sensation in its skin and a very low metabolism...

Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus. Many members of other rodent genera and families are also referred to as rats, and share many characteristics with true rats...

The humpback whale (Megaptera novaeangliae) is a species of baleen whale. One of the larger rorqual species, adults range in length from 12–16 metres (39–52 ft) and weigh approximately 36,000 kilograms (79,000 lb). The humpback has a distinctive body shape, with unusually long pectoral fins and a knobbly head. It is an acrobatic animal, often breaching and slapping the water. Males produce a complex song, which lasts for 10 to 20 minutes and is repeated for hours at a time...