It was rather obvious that the capybaras pictured in #7 of this series were all looking in the same direction, intently.
Probably, their eyes were keenly focused on this post’s hero, who was basking on the wetland’s opposite bank.
S/he is a spectacled caiman – one of six living caiman species. (or three species – caimans’ classification is a contested/confusing field)
Caimans are South & Central America’s crocodilians.
They live in warm, watery places (in ever-diminishing numbers) & are more closely related to alligators than to crocodiles-proper.
Fish comprise the greater portion of their diet, but caimans also prey on young capybaras, & on sick/frail adults.
Only very rarely does a caiman attempt to “take” a healthy adult capybara, because it could well fight back, to lethal effect.
South American humans and South America’s “big cats” almost certainly devour many more capybaras than do caimans.
Raptors & anacondas also target capybaras.
A particularly good Wikipedia entry – here – will tell you much more about capybaras.