Wilson's Warbler is one of the smaller members of the New World warbler family (Cardellina pusilla). A long, slim tail and rounded wings distinguish this species from others. It is a greenish bird above and yellowish below. Males have a black crown patch; females have a reduced or absent mark, depending on the subspecies. The underpart is yellow and green-brown is the only distinguishing characteristic of this bird.
The beautiful white-capped redstart or white-capped water redstart (Phoenicurus leucocephalus) is a passerine bird of the Old World flycatcher family Muscicapidae native to the Indian Subcontinent and Southeast Asia and to certain regions of Central Asia. Both genders are black with red underparts and white crowns atop their heads.
Males' white-capped redstart have a larger white pattern on top of the head and brown or red spots under the wings. It is found in the Indian Subcontinent and Southeast Asia, as well as some adjoining areas. The species ranges across Afghanistan, Pakistan, India, Bangladesh, Bhutan, Cambodia, India, Laos, Myanmar, Nepal, Tajikistan, Thailand, Tibet, and Vietnam. Its natural habitat is temperate forests.
White-capped water redstart species was formerly placed in the monotypic genus Chaimarrornis but was moved to Phoenicurus based on the results of a molecular phylogenetic study published in 2010.
