What are the similarities between humans and humpback whales? And those and others have friends who can be called the best.
Scientists have studied the behavior of whales in the Gulf of St. Lawrence. Humpback whales give birth to yourself friends and meet with them every year in this place. Later, they migrate to breed away from each other by thousands of kilometers, but somehow in the summer of always returning to "the meeting place" to spend time swimming and feed with their friends.
As long as the longest fixed friendly relations account for six years, with never a friendship between a female and a male - only among females the same age.
Thus, we can say that female friendship exists, at least - among the humpback whales.