What animals have hollow bones and streamlined body shape?

Many animals have streamlined body shapes and hollow bones, for the simple reason they strive to go faster, either in a water environment or in the air (Aerodynamics).

Birds have hollow bones and usually have streamlined bodies if they are the product of natural evolution, unlike many game birds today.

In the water, many of the more aquatic mammals, such as Otters, are streamlined to go faster underwater. They do not, however, have hollow bones, their weight supported by the water, as is the case with many of the mammals. Seals and such do not have hollow bones, although they have a layer of blubber and smooth skin, and a mainly streamlined body.