Males of this family are reddish brown; females are bluish green.
Males of this species reach a maximum length of over 2 metres (6.6 feet) and 6 kg (13.2 pounds).
Males of this species are stunning with their long, wire-like crests and exceedingly long, forked tails.
Males of this species have a glowing violet-blue gorget and can be distinguished from Sapphire-bellied Hummingbirds (Lepidopyga lilliae) by their green bellies.
Males of this species reach a maximum length of over 2 meters (6.6 feet) and 6 kg (13.2 pounds).
He studied them intently and described in his book, The Humble Bee, how they built their colony, fed their young and how the males of this species were "particularly fragrant".
Although silent throughout most of the year, from March through June males of this species give a remarkable, far-carrying "boi-nng," call from an exposed perch that has been the subject of many studies on vocal communication.
Males of this subspecies are nearly 2 metres long and weigh up to 137 kg (300 pounds), though the average is 95 kg (71 kg in females, or ewes).
Males of this species express two alternative morphologies in response to larval feeding conditions.
Here we examine the response of male and female swamp sparrows, Melospiza georgiana, to an innovation in song syntax produced by males of this species.
Males of this species have other males as well as females to fear when attempting to mate.
