Cackling goose Cackling goose The cackling goose ("Branta hutchinsii") is a North American bird of the genus "Branta" of black geese, which contains species with largely black plumage, distinguishing them from the grey "Anser" species. The black head and neck with white "chinstrap" distinguish this goose from all other geese except the larger Canada goose ("Branta canadensis") and the similarly sized barnacle goose ("B. leucopsis"). There are up to 5 subspecies of cackling goose, of varying sizes and plumage details. The female looks virtually identical but is slightly lighter and has a different voice. Some are hard to distinguish from the Canada
Polyphemus (crustacean) Polyphemus (crustacean) Polyphemus is a genus of water fleas, and the only genus in the family Polyphemidae. There are two species, "P. exiguus" and "P. pediculus", although allopatric speciation has resulted in a number of cryptic species of "P. pediculus". "Polyphemus exiguus" inhabits open zones in the Caspian Sea, while "Polyphemus pediculus" exists throughout the Holarctic. It lives in diverse conditions, from small ponds to lakes and estuaries such as the Gulf of Saint Lawrence and the Gulf of Finland. It can be found quite far offshore. "Polyphemus" are a predatory genus of water flea. The two species have four