Gular skin

Gular skin (throat skin), in ornithology, is an area of featherless skin on birds that joins the lower mandible of the beak (or bill) to the bird's neck. Other vertebrate taxa may have a comparable anatomical structure that is referred to as either a gular sac, throat sac, vocal sac or gular fold.

In birds

Gular skin can be very prominent, for example in members of the order Phalacrocoraciformes as well as in pelicans (which likely share a common ancestor). In many species, the gular skin forms a flap, or gular pouch, which is generally used to store fish and other prey while hunting.

In cormorants, the gular skin is often colored, contrasting with the otherwise plain black or black-and-white appearance of the bird. This presumably serves some function in social signalling, since the colors become more pronounced in breeding adults.

In frigatebirds, the gular skin (or gular sac or throat sac) is used dramatically. During courtship display, the male forces air into the sac, causing it to inflate over a period of 20 minutes into a startling huge red balloon.

Sacé

Sacé is a commune in the Mayenne department in north-western France.

See also

SAC

SAC or Sac may refer to:

Organizations

Computers

Education

Government and military

Sauk people

The Sac or Sauk are a group of Native Americans of the Eastern Woodlands culture group. Their autonym is oθaakiiwaki, and their exonym is Ozaagii(-wag) in Ojibwe. The latter name was transliterated into French and English by colonists of those cultures.

Today they have three federally recognized tribes, together with the Meskwaki (Fox), located in Iowa, Oklahoma and Kansas.

History

The Sauk, an Algonquian languages people, are believed to have developed as a people along the St. Lawrence River. They were driven by pressure from other tribes, especially the powerful Iroquois League or Haudenosaunee, to migrate to Michigan, where they settled around Saginaw Bay. Due to the yellow-clay soils found around Saginaw Bay, they called themselves the autonym of Oθaakiiwaki (often interpreted to mean "yellow-earth".)

The neighboring Ojibwe and Ottawa peoples referred to them by the exonym Ozaagii, meaning "those at the outlet". French colonists transliterated that as Sac and the English as "Sauk". Anishinaabe expansion and the Huron attempt to gain regional stability drove the Sac out of their territory. The Huron were armed with guns supplied by their French trading partners. The Sac moved south to territory in parts of what are now northern Illinois and Wisconsin.