Cocos Tyrannulet vs Yellow-crowned Tyrannulet

In short

The Cocos Tyrannulet and Yellow-crowned Tyrannulet are both small tyrant flycatchers, but they differ in key features. The Cocos Tyrannulet is endemic to Cocos Island, while the Yellow-crowned Tyrannulet is more widespread. Look for the Yellow-crowned Tyrannulet's semi-concealed yellow crown and yellowish white wingbars, which are absent in the Cocos Tyrannulet.

Identification tips

1. Look for the Yellow-crowned Tyrannulet's yellowish white wingbars and dark gray face. 2. Check for the semi-concealed yellow crown on the Yellow-crowned Tyrannulet. 3. Consider location: the Cocos Tyrannulet is only found on Cocos Island. 4. Note the habitat: if you are not on Cocos Island, you are likely observing a Yellow-crowned Tyrannulet.

Size

Both species are small, but the Cocos Tyrannulet is slightly more compact.

Plumage

The Cocos Tyrannulet lacks the Yellow-crowned Tyrannulet's yellowish white wingbars and semi-concealed yellow crown. The Yellow-crowned Tyrannulet also has a dark gray face, which is not a feature of the Cocos Tyrannulet.

Behaviour

Both species exhibit typical flycatcher behavior, but specific behavioral differences are not well-documented.

Habitat

The Cocos Tyrannulet is restricted to Cocos Island, inhabiting forests, scrub, and second growth, while the Yellow-crowned Tyrannulet is found in a variety of habitats across its range, including open woodlands and edges.

Voice

Vocalizations are not detailed in the sources, so differences in calls are uncertain.