Animals

This means they have no veins, but hemolymph (which functions as blood) is forced by arteries into t ...

The name first appeared in 1954, when Austrian zoologist Eduard Paul Tratz and German biologist Hein ...

There are different visual characteristics between the two sexes – males usually have blue-hued feathers and dark blue on their tails.

The first is Ramphastos toco toco, found in Guyana, French Guiana, Suriname, northern and northeaste ...

It is not particular about the food it consumes. It basically feeds on anything, including small sharks, dolphins, seals, fish, crustaceans, birds, sea turtles, squids, and sea snakes.

While birds eat adult forms, some fish species feed on larvae too. Among mammals, muskrats are one of their common predators.

It is produced in the upper digestive tract with prolactin hormone. Its composition is similar to ma ...

This phenomenon is typical of common chimpanzees, as well as other aggressive behaviors caused by the struggle for influence in the herd. In bonobos, such behaviors have not been observed.

It ranges from yellow to red-orange with distinct black stripes. Their bellies and head sides are white.