The seven levels of classification for a sandhill crane are: Kingdom (Animalia), Phylum (Chordata), Class (Aves), Order (Gruiformes), Family (Gruidae), Genus (Antigone), Species (Antigone canadensis).

An expandable pouch in the esophagus of some birds (members of the Order Gruiformes do not have a crop). The crop functions as a temporary storage area for excess food that can be digested later.

Gerard F. Van Tets has written:

'Comparative Study of Some Social Communication Patterns in the Pelicaniformes'

'Pleistocene cave material of Tasmanian native-hen, Tribonyx mortierii and sooty shearwater, Puffinus griseus in Tasmania' -- subject(s): Fossil Gruiformes, Paleontology, Sooty shearwater

According to the US Fish and Wildlife Services Endangered Species List, the name "Grus americana" is for a bird that is listed as "endangered" with the common name of Whooping Crane. The name "Grus americana" is the scientific name for the species, and the following is a list of the full scientific classification for the Whooping Crane. * Kingdom: Animalia * Phylum: Chordata * Subphylum: Vertebrata * Class: Aves * Order: Gruiformes * Family: Gruidae * Genus: Grus * Species: Grus americana For more details, please see sites listed below.