Cocoi Heron
Ardea cocoi
The cocoi heron is the largest of the South American heron species and measures 95–130 cm (37.5–51 in) in length, although body sizes vary regionally; with southern individuals probably being the largest. Adult weight of both males and females can variously range from 1.14 to 3.2 kg (2.5 to 7 lb). In the adult, wing length has been recorded as 421–455 mm (16.5–18 in), tail length 161–173 mm (6.5–7 in), culmen from base 128.5–148.7 mm (5–6 in) and tarsus 179–192 mm (7–7.5 in).
ID text from Wikipedia, CC BY-SA 4.0
Grey Heron
Ardea cinerea
The grey heron is a large bird, standing up to 100 cm (40 in) tall and measuring 84–102 cm (33–40 in) long with a 155–195 cm (61–77 in) wingspan. The body weight can range from 1.02–2.08 kg (2 lb 4 oz – 4 lb 9+1⁄4 oz). The plumage is largely ashy-grey above, and greyish-white below, with some black on the flanks. Adults have a white head and neck with a broad black supercilium that terminates in the slender, dangling crest, and bluish-black streaks on the front of the neck. The scapular feathers and the feathers at the base of the neck are somewhat elongated.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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