Black-throated Blue Warblers are small, well-proportioned birds with sharp, pointed bills. Compared with other warblers, they are fairly large and plump.
Larger than a Blue-gray Gnatcatcher, smaller than a Hermit Thrush.sparrow-sized or smaller
- Both Sexes
- Length: 4.3-5.1 in (11-13 cm)
- Weight: 0.3-0.4 oz (8-12 g)
- Wingspan: 7.5-7.9 in (19-20 cm)