Mature bald eagles have a dark brown body with white head and tail. The large, hooked bill, strong talons, and irises of the eyes are yellow. Females are larger than males, but otherwise the sexes look alike. In flight, bald eagles soar on rising warm air currents on flattened wings (not holding them V-shaped). Juveniles are all brown, with white speckles. Voice is a series of chirps or a loud screaming whistle.