Search results
Results from the WOW.Com Content Network
Wolves do not bark as loudly or continuously as dogs do but they bark a few times and then retreat from a perceived danger. [4] Aggressive or self-assertive wolves are characterized by their slow and deliberate movements, high body posture and raised hackles , while submissive ones carry their bodies low, sleeken their fur, and lower their ears ...
A facial expression database is a collection of images or video clips with facial expressions of a range of emotions.Well-annotated (emotion-tagged) media content of facial behavior is essential for training, testing, and validation of algorithms for the development of expression recognition systems.
In humans, a distinction is sometimes made between "basic" and "complex" emotions. Six emotions have been classified as basic: anger, disgust, fear, happiness, sadness and surprise. [14] Complex emotions would include contempt, jealousy and sympathy. However, this distinction is difficult to maintain, and animals are often said to express even ...
Since 1973, the gray wolf has been on and off the federal government's endangered species list. When the wolves are on the list, advocates say the protections help wolves' place in the natural ...
Video shows the intense moment a pack of wolves chases down a herd of more than 300 elk in Yellowstone National Park. The video follows the elk herd as it races away from wolves trailing behind it.
Slightly smaller than gray wolves, their southern relatives, Arctic wolves typically weigh between 55 and 70 pounds as adults. They can travel long distances and hunt in packs, which aids them in ...
Chimpanzees, gorillas and orangutans show laughter-like vocalizations in response to physical contact such as wrestling, play chasing or tickling. Some orangutans also react with laughter at magic tricks performed by humans. [3] [4] This behavior is documented in both wild and captive chimpanzees.
The wolf must give chase and gain on its fleeing prey, slow it down by biting through thick hair and hide, and then disable it enough to begin feeding. [4] After chasing and then confronting a large prey animal, the wolf makes use of its 6 cm (2 + 1 ⁄ 2 in) fangs and its powerful masseter muscles to deliver a bite force of 28 kg/cm 2 (400 lbf/in 2), which is capable of breaking open the ...