The spectacular breeding plumage of the male Eastern Paradise Whydah is set off by the tail feathers. These are a visual sign to females he is fit

4 chambered heart, aerodynamics, africa, aves, avian, behaviour, birdwatching, breeding, bristles, brood-parasitic, contour feathers, display, eastern paradise-whydah, eclipse plumage, environment, feathers, gleaner, habitat, keratin, living dinosaur, long tail, males breeding plumage, mixed flocks, olfactory, ornithology, oscines, paradise whydah, parasitize green-winged pytilia, passeriformes, passerine, plumage, polygynous, preening, primary, promiscuous, quill, rainy season, safari, scales, secondary, shaft, singing, sociable, streamers, tail, vertebrate, vidua paradisaea, viduidae, warm blooded, whydahs,