Brooks's leaf warbler (Phylloscopus subviridis) is named after ornithologist William Edwin Brooks, father of the Canadian bird illustrator Allan Brooks. A civil engineer in India, Brooks was the first to suggest that each species of warbler had a distinctive call. Brooks's Leaf Warbler differs from Hume's Warbler in having a yellow supercilium with yellowish cheeks faintly mottled pale brown. It has a dark bill with a pale base, yellow on face and breast, a distinctive yellow crown stripe, and at least one white wingbar – sometimes two. Found in Afghanistan, India, Kazakhstan, Pakistan, Russia, and Turkmenistan, its natural habitats are boreal and temperate forests.
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