Ang usa (Ingles: deer) ay isang uri ng hayop na namumuhay sa bundok at gubat. Venison (Ingles) ang karneng nakakain mula sa usa. Tinatawag na libay (Ingles: doe o hind) ang babaeng usa, samantalang barako naman (Ingles: roebuck o hart) ang lalaking usa.[2]

Usa[1]
Temporal na saklaw: Early Oligocene–Recent
Images of a few members of the family Cervidae (counterclockwise from top left): the elk (Cervus canadensis), white-tailed deer (Odocoileus virginianus), grey brocket (Mazama gouazoubira), barasingha (Rucervus duvaucelii), pudú (Genus: Pudu), sika deer (Cervus nippon), red deer (Cervus elaphus), and reindeer (Rangifer tarandus)
Klasipikasyong pang-agham e
Dominyo: Eukaryota
Kaharian: Animalia
Kalapian: Chordata
Hati: Mammalia
Orden: Artiodactyla
Infraorden: Pecora
Pamilya: Cervidae
Goldfuss, 1820
Tipo ng genus
Cervus
Linnaeus, 1758
Subfamilies
Combined native range of all species of deer.

Mga sanggunian

baguhin
  1. 'deer' singular and plural among examples (swine OE swin, deer OE deor, sheep OE sceap, horse OE hors, year OE gear, pound OE pana) -Jespersen, A Modern English Grammar on Historical Principles, Part II SYNTAX (First Volume), Ch.III The Unchanged Plural (p. 49) arrow.latrobe.edu.au accessed 14 November 2020
  2. English, Leo James. Diksyunaryong Tagalog-Ingles, Kongregasyon ng Kabanalbanalang Tagapag-ligtas, Maynila, ipinamamahagi ng National Book Store, may 1583 na mga dahon, ISBN 971-91055-0-X

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