Pale-rumped Swift

A tiny black-and-white rainforest wattle-eye. Both sexes have a chestnut patch on the side of the face and blue bare skin around the eye, though this eye wattle is larger in males. Found in the understory of rainforest. Somewhat similar to Chestnut Wattle-eye, but does not have a black chest band or extensive chestnut throat. Inconspicuous and difficult to observe; most readily detected by vocalizations. These are variable, but typically consist of piercing, high-pitched whistles which are repeated, sometimes for a long time. 

A large, long-tailed, streak-backed upland cisticola. Note the lack of rufous or rich brown in the plumage, and also the pale tips to the tail. Found in dry thorn savanna and thornscrub. Similar to other cisticolas, especially Rattling, Tana River, and Boran, but identified by its song and by the absence of rufous or brown on the cap. Often sits on top of bushes and trees to sing. Song is a short musical whistled phrase, usually with a downward pitch trend, but sometimes trending upward. Much more musical than the song of Boran Cisticola, often with more variation in pitch. The calls are high-pitched squeaks. 

Peak-headed diving duck. Males have black breast, finely-barred gray back, whitish sides (often slightly dusty-looking), and yellow eye. Head appears black with a purplish or greenish sheen in good light. Females are brown overall with white patch at base of bill and yellow eye. Very similar to Greater Scaup; note Lesser’s peaked head shape with angle near the rear of crown, slimmer cheeks, less extensive white stripe on wing in flight, and smaller, narrower bill. Also similar to Ring-necked Duck, but Lesser Scaup has grayer back and whiter sides. Usually in flocks or pairs on a variety of wetland habitats, from small ponds to large lakes and bays. Slightly more likely to be seen on smaller bodies of water, especially fresh water, than Greater Scaup, but much overlap. Frequently in mixed flocks with other Aythya ducks. Widespread across North America, with more southerly range extent than Greater Scaup, regularly reaching northern South America.