Short-tailed Parrotbill

Rather large sparrow with flat head and long bill. Dull brownish overall with darker streaks on back; subtle head pattern with slightly darker crown and eyeline. Primarily a Mexican species with two populations, both of which barely enter the U.S.; western birds brighter than eastern birds. Prefers grasslands with some shrubs. Shy, but perches conspicuously when singing. Similar to Cassin's Sparrow; note flatter head, longer bill, lack of eyering, and voice. Gives a series of sharp varied chips and a fast trill; much different than Cassin's sweet song.

Adult is unique, a vision in glossy black and pale pink. Juvenile is brown with an orange bill. Breeds in colonies on steppes and winters in open and wooded habitats. Gathers in huge numbers to roost, often mixing with other species at roost sites. Flocking birds keep up a constant cacophony of dry chattering calls. 

Small black-and-white shearwater that flies with snappy wingbeats. Pay attention to its face pattern: typically quite dark and smudgy, with white curling up behind the cheek. Underwing is mostly white, sometimes with dark markings. Flies low to the water with quick wingbeats, almost recalling an alcid; occasionally arcs up high in strong wind. Prefers cooler ocean waters in the North and South Atlantic; rarely seen from land. Rare but seemingly increasing in the Pacific. Found singly or in small flocks, sometimes with other shearwaters. In Caribbean and western Atlantic, most similar to Sargasso Shearwater but shorter-tailed and darker-faced, with white under the tail.