Greylag goose the western greylag goose, breeds in Iceland and north and central Europe; "A. a. rubrirostris", the eastern greylag goose, breeds in Romania, Turkey and Russia eastwards to northeastern China. The two subspecies intergrade where their ranges meet. The greylag goose sometimes hybridises with other species of goose including the barnacle goose ("Branta leucopsis") and the Canada goose ("Branta canadensis"), and occasionally with the mute swan ("Cygnus olor"). The greylag goose was one of the first animals to be domesticated; this happened at least 3000 years ago in Ancient Egypt, the domestic breed being known as "A. a. domesticus". As the
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