mammal: Media
animal
Videos
Which mammals have the shortest and longest gestations
Learn how the length of gestation varies among animals such as elephants and opposums.
Images
goat herding
Herding goats along the ancient Silk Road, northern Takla Makan Desert, China.
Bob Thomason/Tony Stone Worldwide
Steller's sea cow
The Steller's sea cow (Hydrodamalis gigas), extinct since the 18th century,...
Encyclopædia Britannica, Inc.
bottlenose dolphins
A newborn bottlenose dolphin calf swimming alongside its mother at SeaWorld amusement...
PRNewsFoto/SeaWorld San Diego/AP Images
journey of a fertilized egg
The journey of a fertilized egg in a woman. In mammals, eggs are released by the...
Encyclopædia Britannica, Inc.
embryonic development
The state of development of a human embryo at the seventh week of pregnancy.
Encyclopædia Britannica, Inc.
leopard
Leopard (Panthera pardus) grooming her cub in the Masai Mara National Reserve,...
Digital Vision/Thinkstock
Yellowstone wolf pack
Wolves in a pack in Yellowstone National Park. Wolves are territorial mammals, and...
Doug Smith/U.S. National Park Service
hibernating bats
A cluster of Virginia big-eared bats (Corynorhinus townsendii virginianus)...
U.S. Fish and Wildlife Service
survivorship curve
Type I, II, and III survivorship curves. A survivorship curve is the graphic representation...
Encyclopædia Britannica, Inc.
brown bear
Brown bear (Ursus arctos) running across the water in Katmai National Park...
moodboard/Thinkstock
parallel evolution of marsupial and placental mammals
Parallel evolution of marsupial mammals in Australia and placental mammals on other...
Encyclopædia Britannica, Inc.
African lion
A yawning African lion (Panthera leo) showing its long canine teeth.
© Jay Bo/Shutterstock.com
internal structure of a human long bone
Internal structure of a human long bone, with a magnified cross section of the interior....
© Merriam-Webster Inc.
nephron of the kidney
Each nephron of the kidney contains blood vessels and a special tubule. As the filtrate...
Encyclopædia Britannica, Inc.
male reproductive organs
Sagittal section of the male reproductive organs, showing the prostate gland and...
Encyclopædia Britannica, Inc.
uterus
The uterus is an inverted pear-shaped muscular organ of the female reproductive system,...
Encyclopædia Britannica, Inc.
left cerebral hemisphere of the human brain
Medial view of the left hemisphere of the human brain.
Encyclopædia Britannica, Inc.
Lystrosaurus
Therapsids, such as Lystrosaurus, were mammal-like reptiles that thrived...
Encyclopædia Britannica, Inc.
Castorocauda
Castorocauda weighed 500 to 800 grams (1.1 to 1.8 pounds) and was almost...
Encyclopædia Britannica, Inc.
mammalian pituitary gland
Elements in a generalized mammalian pituitary gland.
Encyclopædia Britannica, Inc.
Batodonoides vanhouteni
Batodonoides vanhouteni, an extinct ancestor of modern shrews and moles,...
Encyclopædia Britannica, Inc.
How long do animals live?
This graphic shows the maximum life spans of selected animal species.
Encyclopædia Britannica, Inc.
generalized labyrinth of vertebrates
Generalized labyrinth of various vertebrates.
Encyclopædia Britannica, Inc.
Earth's faunal regions
System of faunal regions based on a reanalysis of mammalian distributions by Charles...
Encyclopædia Britannica, Inc.
Tree of life illustrating the three-domain classification of life-forms
The tree of life according to the three-domain system of biological classification.
Encyclopædia Britannica, Inc.
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