Back Start Next Identifying Rufous Hummingbirds Field marks are physical features or behaviors of an organism that can be clearly seen and used to distinguish the organism from other similar species. Scientists and birdwatchers use field marks to identify rufous males and females. Rufous (male) Rufous (female) Same as male EXCEPT Crown: brownish with some green Throat: metallic orange-bronze, can look black in some light Chest: white Back: brownish-red, or rust; some green at the shoulders Wings: near-black Sides: brownish-red, or rust Tail: brownish-red or rust Rump: brownish-red or rust Crown: green with some brown Throat: white with tan streaking, occasionally a few red feathers Chest: grayish-white Back: green Tail: with white tips Rump: green Photo: Ed Robertson Photo: Ed Robertson