Blue-gray Gnatcatchers are tiny, slim songbirds with long legs; a long tail; and a thin, straight bill.
Slightly larger than a Ruby-throated Hummingbird, Slightly smaller than a House Wren.sparrow-sized or smaller
- Both Sexes
- Length: 3.9-4.3 in (10-11 cm)
- Weight: 0.2-0.3 oz (4.8-8.9 g)
- Wingspan: 6.3 in (16 cm)