aythya affinis

Thân thiện

A male aythya affinis dives for food in a calm lake.

Definition

Noun 1. A species of diving duck: Aythya affinis is the scientific name for a specific North American diving duck commonly known as the lesser scaup. It is characterized by a rounded head and, in males, distinctive purplish-black iridescence on the head.

Usage

• The term is used primarily in formal, scientific, ornithological, and birdwatching contexts to precisely identify this species.
• In everyday language, the common name "lesser scaup" is more frequently used.

Examples

• Scientific Context:
  • The study focused on the migration patterns of Aythya affinis.
  • Ornithologists can distinguish Aythya affinis from the greater scaup by its head shape and wing stripe.
• General/Birdwatching Context:
  • We spotted a large raft of Aythya affinis on the lake.
  • The guide pointed out the purplish sheen on the head of the male Aythya affinis.

Advanced Usage

• The name follows binomial nomenclature, where is the genus (a group of similar diving ducks) and is the specific epithet, often indicating a relationship or likeness (in this case, to the greater scaup, ).

Variants and Related Words

• Lesser Scaup (n): The standard common English name for .
• Bluebill (n, informal): A regional or informal name sometimes used for scaup ducks, referring to their bluish-gray bill.
• Scaup (n): The general common name for ducks of the genus , which includes both the lesser and greater scaup.

Synonyms

• Lesser Scaup: This is the direct synonym and common name.
• Little Bluebill (regional): An informal synonym used in some areas.

Different Meanings

• The term has only one specific meaning: it refers exclusively to the biological species known as the lesser scaup. It is not used idiomatically or with other definitions.

Học thuật

Noun

1. common scaup of North America; males have purplish heads

Từ đồng nghĩa

• lesser scaup
• lesser scaup duck
• lake duck
• Aythya affinis