White-crowned Cuckoo

Restricted to the Azores, Canary Islands, and Madeira. Slightly bigger than European Serin and yellow-green overall with a pale bill, and a dark forked tail. Has a streaky rump, but this can be hard to see. Males are greenish-yellow below while females are duller and grayer on the breast and neck. The song is very melodic and rich. Found in forests, plantations, gardens, and orchards, sometimes gathering in flocks. Introduced to the Midway Atoll, where coloration ranges from unstreaked bright yellow to almost white.

Medium-sized thrush-like bird, often seen on mountainsides, sea cliffs, quarries, ruins, and even towns. Males usually unmistakable: western birds are dark blue all over, but may appear all dark at a distance; eastern birds are blue with orange underparts. Females dark brown above, finely barred below. Long bill, wings, and tail make for a distinctive and very different shape than Rufous-tailed Rock-Thrush. Song is melodic and blackbird-like.

A small swallow with white underparts and dark blue upperparts. The tail shows an unusual pattern: a dark rim around large white panels both above and below. Found very locally in southern Ethiopia in open thorn savanna, in areas with many large termite mounds. Often in pairs. Similar to Gray-rumped Swallow, but easily separated by the white in the tail. Could be confused with Common House Martin, but has white in the tail rather than a bold rump patch.