The White-tailed Eagle (Haliaeetus albicilla) — also called the Sea Eagle, Erne (sometimes Ern), and White-tailed Sea-eagle — is a large bird of prey in the family Accipitridae which includes other raptors such as hawks, kites, and harriers. It is considered a close cousin of the Bald Eagle and occupies the same ecological niche, but in Eurasia.
Tenderness and love, mama & cub. Although Polar bears are the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice, and open water, and for hunting the seals which make up most of its diet.
Frilled sharks are notorious for their odd dentition. Approximately 300, three-pointed teeth set into 27 rows fill the mouths of Frilled Sharks. Do the math and you’ll find that every Frilled Shark has about 1000 pointy hooks to grab onto its fishy prey. Primitive maybe, deadly definitely.
The Aye-aye is a strepsirrhine native to Madagascar that combines rodent-like teeth with a long, thin middle finger to fill the same ecological niche as a woodpecker. It is the world's largest nocturnal primate, and is characterized by its unusual method of finding food; it taps on trees to find grubs, then gnaws holes in the wood and inserts its elongated middle finger to pull the grubs out.