It depends on the kind of ant and the kind of rainforest. Animals that eat large kinds of ants like leafcutter ants major workers might not even notice tiny kinds of ants like Argentine ants. Animals that eat large ants in small colonies could only get a few ants at a time, so such animals usually are small or eat a lot of other things as well, otherwise they would starve. Animals with tough, hairy skins, such as anteaters might not mind eating ants with sharp jaws, and they even might not mind eating some stinging ants, but they might not be able to eat large amounts of poisonous ants.
In general however in rainforests one gets some kinds of anteaters. In African and Asiatic rainforests one might find pangolins (scaly anteaters) eating ants and termites. In the Americas there are a few species of tamanduas and pygmy anteaters. In Australia there are several kinds of marsupials that eat ants. In all continents and all rainforests there are various kinds of insects that each ants, for example some kinds of assassin bugs. There also are some kinds of birds that eat ants. Some birds such as the family of antbirds that live in the Americas, have been said to eat ants, but actually they seldom do so; they mainly follow ant swarms to eat the animals that the ants flush out of cover.
Rainforest frogs, including the poison-arrow tree frogs, eat a lot of ants and in fact they get their poison from the ants they eat.
The echidna is a monotreme which eats ants.
Armidillos eat fire ants.
you
ants eats dinosaurs
beetles and ants!
if a dog eats ants its perfectly fine dogs eat everything
a ants eats grasshopers and leafs
Birds
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Anteaters
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bull ants