Pigarguillo menor Icthyophaga humilis

Gray-brown eagle with piercing yellow eyes and an immaculate white belly. Juvenile paler and browner than adult, with weakly streaked underparts. Most easily separated from larger Gray-headed Fish-Eagle in flight: note Lesser’s “dirtier” tail with a less contrasting black band and more mottled underwings in adult; note overall paler underside patterning in juvenile. White belly also tends to have a more poorly-defined and jagged shape than the sharp “V” of Gray-headed. Favors faster-flowing foothill streams and rivers, but can also be found in lowland lakes and wetlands.