Species with sexually dimorphic traits that can be used to determine the sex of an individual in the field. Most notes are copied and pasted from Wikipedia.
You can use these links to find observations of these species that don't have the sex marked, so you can use this list to add it. Once you open the links, you can narrow the search by location.
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M: line from bill to throat is red | F: line from bill to throat is black
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Males have red all along the top of the head, from the beak to the back of the neck. Females only have red on the back of the head and a smear of orange at the top of the beak.
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The male's whole head is red; the female has a black throat and front of crest. (The female can be distinguished from the lineated woodpecker by the absence of a white facial stripe.)
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M: forehead bright red (rarely yellow); throat red | F: red, pale red, red/black mixed (rarely whole head is black with buff spots); throat white | J: olive-brown, buff-striped head, streaked crown... Más
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Adult males have a red throat patch; for females, the lower part of the throat is red, the upper part white.
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The female lacks the red patch on the back of the head
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M: red patch(es) on back of head; juveniles have orange-red on crown | F: no red
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M: blue eye ring, purple-blue markings. F: emerald eye ring, no blue markings. m: green feathers mixed in with the blue.
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M lower mandible black, F red with black tip
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F: rufous band across upper belly, down flanks. J: both sexes with red band, somewhat mottled on m, thinner than adult on f.
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The casque on the top of the bill is larger in males.
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M: tail may be longer than body; crest may be longer than head | F: much shorter tail and crest (crest about the same length as head)
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Females dull colors except for blue/green on head/neck, and have much shorter tails than males.
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Males much more colorful, longer tails, slightly larger than females.
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M: green on top, black beneath | F: bronze-green on top, white beneath with black central stripe | Juvenile: brown around eyes, gray or buff on feather tips and wings
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M: iridescent red throat patch, forked iridescent violet forked tail. F: White or stippled/streaked throat, notched tail with green-banded outer feathers. J: looks like F; you won't see any outside... Más
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M bright green mask, cream cap (breeding); "looks more like the female" (eclipse); large white shoulder patch on each wing; three-note whistle, wheezy whoee-whoe-whoe | F: gray/brown plumage; "hoar... Más
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Breeding males (summer?) have iridescent green head
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M: all black, purple-blue iridescence | F: smaller, dull brown, sometimes paler below
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M: black, yellow head and breast, white wing patch. F: brown, dull yellow throat and breast. J: brown, males with dull yellow head and breast.
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M: Black, yellow head and breast. F: brown, dull yellow throat and breast. J: brown, m with dull yellow head/breast.
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M: orange underparts, shoulder rump; else black. F: yellow-brown upper, darker wings, and dull orange-yellow breast and belly. J: similar-looking to the female.
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Males black, females brown; jm black but not iridescent, jf brown but duller and with blotches on chest
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Males black with red patch; females brown; juveniles resemble the female, but are paler below and have buff feather fringes
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the brightly coloured breeding male has chestnut shoulders and azure crown and ear coverts, while non-breeding males, females and juveniles have predominantly grey-brown plumage, although females o... Más
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Males are glossy black with a chestnut belly and white feathers on the rump and outer tail. Females are more greyish-brown, and are typically shorter than males. Both sexes have a black bill and pi... Más
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The forehead, throat and upper breast of the adult male is a dark, metallic blue-black.
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The males appear all black except in some lighting when the purple iridescence becomes visible. Females are olive above and yellowish below.
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• Males have dark chestnut on the wings/back/head, and a black bib/'goatee'. • Females have paler brown and lack the black. • Juveniles look similar to females, but with less contrast, no defined w... Más
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Females have patches of solid brown; males are all black and white
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• Males are red. • Females are reddish olive. • Juveniles look similar to females, but their beaks are grayish-black; adults of both sexes have red-orange beaks.
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Male entirely glossy blue-black. Female a rich chestnut above, white below, with black crown and face
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Adult males have a black cap, black throat and yellow lower breast; females have a dark cap and a yellow throat. Immature birds are similar to females with a dark green cap and cheeks
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Males have a grey hood; female and immatures are more brown and have a whitish throat.
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The male has dark brown to black eyes and the adult female yellow eyes.
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M: green above, yellow below, black head, narrow yellow collar, yellow rump. black tale w/ yellow sides, black wings with yellow band. F: duller, green-brown head, yellow-green breast and sides and... Más
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Adult males are raspberry red on the head, breast, back and rump; their back is streaked. Adult females have light brown upperparts and white underparts with dark brown streaks throughout; they hav... Más
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Males of this species have dark glossy blue-black upperparts excluding a yellow forecrown, and bright yellow underparts, while females have olive green upperparts and whitish-gray breast and lower ... Más
