Black-tailed Gnatcatcher vs Black-capped Gnatcatcher

In short

The Black-tailed Gnatcatcher and Black-capped Gnatcatcher are small, active birds often found in arid regions. The most reliable field mark is the male Black-capped Gnatcatcher's extensive black cap, which contrasts with its pale eye-ring, unlike the Black-tailed Gnatcatcher.

Identification tips

• Male Black-capped Gnatcatcher: Look for the extensive black cap and pale eye-ring.
• Female and nonbreeding males: More challenging; focus on habitat and behavior.
• Tail behavior: Black-tailed Gnatcatchers often wag their tails side to side.
• Habitat: Consider location; Black-tailed Gnatcatchers are more common in the U.S. Desert Southwest.

Size

Both species are similarly small and slender, typical of gnatcatchers.

Plumage

Male Black-capped Gnatcatchers have a glossy black cap extending below the eyes, contrasting with a pale eye-ring. Female Black-capped Gnatcatchers and Black-tailed Gnatcatchers have less distinct head markings, with the latter lacking the extensive black cap.

Behaviour

Both species are active foragers, often seen flitting and darting in search of insects. Black-tailed Gnatcatchers are known for their tail-wagging behavior.

Habitat

Black-tailed Gnatcatchers inhabit dense thorn scrub and thickets in the Desert Southwest. Black-capped Gnatcatchers are found in similar arid habitats but may move south post-breeding.

Voice

The Black-tailed Gnatcatcher is noted for its 'zhee-zhee-zhee' call. Specific vocal differences with the Black-capped Gnatcatcher are less documented.