It seldom flies, soon diving back into cover, and when it alights it often raises and flares its tail to show its streaked under-tail coverts.
32.
Unlike the Indian peafowl, the green peahen is similar to the male, only having shorter upper tail coverts, a more coppery neck, and overall less iridescence.
33.
The tail feathers of the male are uniformly rufous, becoming darker towards the tips, whereas the lower tail coverts of females are white, barred with black and red.
34.
The throat is pale buff, darkening to reddish-buff at the edges and on the breast, and paling again on the belly, becoming white at the under tail coverts.
35.
Sexually dimorphic, the male has navy blue upperparts with a bright red streak down its back from its crown to its tail coverts, while the female and juvenile are predominantly olive green.
36.
The blue-winged pitta has buff crown sides and supercilia, rather than the chestnut of the fairy pitta, brighter upper tail coverts, darker yellowish brown belly, and vivid blue on upper wing coverts.
37.
The male peafowl is predominantly blue with a fan-like crest of spatula-tipped wire-like feathers and is best known for the long train made up of elongated upper-tail covert feathers which bear colourful eyespots.
38.
This species can be distinguished from the Eurasian crag martin and rock martin by its darker underparts, The under-tail coverts are of the same shade as the underside of the abdomen but these are darker in the Eurasian crag martin.
39.
The exaggerated, elongated upper tail coverts make up the " train " of the peacock . Therefore, mate choice with respect to the MHC has probably evolved so that females choose males either based on diverse genes ( heterozygote advantage and inbreeding avoidance hypotheses ) or good genes.
40.
By analogy, if peacock'tails'( large tail covert feathers ) act as a handicapping system, and a peahen knew nothing about two peacocks but the sizes of their tails, she could " infer " that the peacock with the bigger tail has greater unobservable intrinsic quality.
