Definition

Noun A small, migratory North American bird (Petrochelidon pyrrhonota) that lives in large colonies and constructs distinctive bottle-shaped nests made of mud, typically attached to vertical surfaces such as cliffs or the walls of buildings.

Examples

• The cliff swallow is known for its skillful, acrobatic flight as it catches insects in the air.
• We watched hundreds of cliff swallows returning to their mud nests under the bridge.
• The presence of cliff swallows is often welcomed by farmers because they consume large quantities of flying pests.

Advanced Usage

• Colonial nester: The term "cliff swallow" is often used in ornithology as a prime example of a colonial nester, a species that breeds in dense, social aggregations.
  • The study focused on the social dynamics within a cliff swallow colony.*
• Indicator species: In environmental science, cliff swallows can serve as an indicator species for the health of insect populations and the availability of suitable nesting sites.
  • A decline in the local cliff swallow population may signal a broader ecological issue.*

Variants and Related Words

• Barn swallow (): A related species of swallow with a deeply forked tail, often found in similar habitats but typically building cup-shaped nests inside structures rather than mud retorts on exterior walls.
• Mud nest: The primary construction material and defining feature of the cliff swallow's nest.

Synonyms

• American cliff swallow: A fuller, more formal name for the species.
• Petrochelidon pyrrhonota: The scientific (Latin) name for the species.

Related Phrases

• Cliff swallow colony: Refers to a large group of these birds nesting together in one location.
  • The noise from the cliff swallow colony under the eaves was constant at dusk.*

Noun

1. North American swallow that lives in colonies and builds bottle-shaped mud nests on cliffs and walls