Great Snipe
Gallinago media
At 26–30 cm (10–12 in) in length and a 42–50 cm (17–20 in) wingspan, adults are only slightly larger, but much bulkier, than the common snipe and have a shorter bill. The body is mottled brown on top and barred underneath. They have a dark stripe through the eye. The wings are broad, and a pale wingbar is visible in flight. The voice is described as a faint yeah. Mating display calls of groups can be heard at long distances (more than 300 m (330 yd)) and sound like a mixture of firecracker wind-up xylophone sounds.
ID text from Wikipedia, CC BY-SA 4.0

Pantanal Snipe
Gallinago paraguaiae
The adult Pantanal snipe is 26 to 30 cm (10 to 12 in) long. Males weigh about 105 to 140 g (3.7 to 4.9 oz) and females 115 to 185 g (4.1 to 6.5 oz). Females are slightly larger than males but otherwise the same. They have short greenish-gray legs and a very long straight dark bill. Their upperparts have a complex pattern of muted whitish, buffy, rufous, and black on a brown background. Their breast and flanks are buff with black markings and the rest of their underparts whitish. Their face has tan and darker brown stripes that blend into each other.
ID text from Wikipedia, CC BY-SA 4.0
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