Gray-backed Sparrow-Lark
Eremopterix verticalis
A small, compact finch-like sociable lark that is both resident and nomadic, although movements are poorly understood. The sexes differ in plumage: the male has a gray-brown back and wings with a scalloped pattern, and a black head with bold white ear patches that reach the back of the neck; the streaky female is variable depending on geographic range, but always has a dark belly patch and tends to be paler than other female sparrow-larks. Flocks of 20 to 100 birds (often mixed with other sparrow-larks or with Stark’s Lark) can appear in grassy patches in semi-arid shrublands and fallow fields. They shuffle along in bare patches foraging for seeds and insects.
Taxonomy
Four subspecies are recognized:
- Scientific name
- Eremopterix verticalis
- Authority
- (Smith, A, 1836)
- Order
- Passeriformes
- Family
- Alaudidae
- Genus
- Eremopterix
Range and habitat
- Migration
- Nomadic movement
Conservation
- Population trend
- stable
Photos
Distribution
Bird Calls
Other Birds

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Fairly large, long-tailed, olive-green greenbul with a yellow throat. Found in forest, thick woodland, scrub, and rank cultivation. Rather shy and skulking species that is normally in pairs or small groups. Quite vocal; the call is a rapid, up-and-down barking. Similar to bearded greenbuls, but slimmer and without a reddish tail.

Capped Heron
Pilherodius pileatus
This gorgeous medium-sized heron is uncommon but widespread in lowlands of South America, barely extending into eastern Panama. Not likely to be mistaken: combination of silvery back, buffy neck and belly, black cap, and blue lores (sometimes radiant turquoise!) help distinguish this species from other herons. Also note the long white plumes on the back of the head. Occurs around swamps, forested ponds, and rivers, usually singly.

Black Tern
Chlidonias niger
Small tern with an entirely black body in breeding plumage with silvery wings. In the winter, their body is whitish-gray and they are not as conspicuous, but note small size, rather dark gray wings and rump, and black "helmet." Breeds in colonies in freshwater marshes and ponds. Builds a floating nest of plant matter. In migration and winter, often found in flocks. Feeds on insects and small fish.
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