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觀察細節
Photos. In studying the light morph of Harlan's Hawk and Krider's Red-tailed Hawk, I see that two sub-species are very similar in appearance. But one mark we noticed that separates the two subspecies, is the thin white tip across the the tip of the tail, and the thinner black line above the broader white. I have noticed this field mark on in eBird's Macaulay's photographic library.
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