vesper sparrow

noun

variants or less commonly vesper bird

: a common American sparrow (Pooecetes gramineus) having the outer tail feathers white and singing especially in the evening

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now