Green Heron
Butorides virescens
The green heron is a relatively small heron; adult body length is about 44 cm (17 in). The neck is often pulled in tight against the body. Adults have a glossy, greenish-black cap, an iridescent greenish back and wings that are gray-black grading into green or blue, a chestnut neck with a pair or more of white lines down the front, gray underparts and short yellow legs. The bill is dark with a long, sharp point. Female adults tend to be smaller than males, and have duller and lighter plumage, particularly in the breeding season.
ID text from Wikipedia, CC BY-SA 4.0
Striated Heron
Butorides striata
The striated heron is 35–48 cm (14–19 in) in length, weighs 130–250 g (4.6–8.8 oz) and has a wing-span of 52–60 cm (20–24 in). The sexes are alike. The plumage is variable below, from mid grey to pinkish-purple or orangey toned. Adults have a blue-grey back and wings, white underparts, a black cap, a dark line extends from the bill to under the eye and short yellow legs. Juveniles are browner above and heavily streaked below.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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