Ads
related to: dog fact sheet for kids worksheet book for girls printable free
Search results
Results From The WOW.Com Content Network
Dogs, wolves, and dingoes have sometimes been classified as separate species. [6] In 1758, the Swedish botanist and zoologist Carl Linnaeus assigned the genus name Canis (which is the Latin word for "dog") [13] to the domestic dog, the wolf, and the golden jackal in his book, Systema Naturae.
The dogs were selectively bred as either sled dogs or as hunting dogs, which implies that a sled dog standard and a hunting dog standard existed at that time. The optimal maximum size for a sled dog is 20–25 kg (44–55 lb) based on thermo-regulation, and the ancient sled dogs were between 16–25 kg (35–55 lb).
This list of dog breeds includes both extant and extinct dog breeds, varieties and types. A research article on dog genomics published in Science/AAAS defines modern dog breeds as "a recent invention defined by conformation to a physical ideal and purity of lineage".
Dogs' pupils are larger and their central retinas have more cells dedicated to light sensitivity than to color detection. That gives them an upper hand when it comes to making out objects in dim ...
Albinism is a rare genetic condition that causes a lack of pigmentation in the skin, hair and eyes. Because the gene itself is so rare, albino dogs are also incredibly rare.
A drawing by Konrad Lorenz showing facial expressions of a dog - a communication behavior. X-axis is aggression, y-axis is fear. Dog behavior is the internally coordinated responses of individuals or groups of domestic dogs to internal and external stimuli. [1] It has been shaped by millennia of contact with humans and their lifestyles.
The post 23 of the Cutest Black Dog Breeds appeared first on Reader's Digest. All dog breeds are beautiful, but black dog breeds are often left behind in shelters. These pretty pooches will melt ...
Go, Dog. Go! is a 1961 children's book written and illustrated by P. D. Eastman . It describes the actions and interactions of a group of highly mobile dogs , who operate cars and other conveyances in pursuit of work, play, and a final mysterious goal: a dog party.