I thought the reverse at some point until I realized that a couple of woodpeckers were making sounds similar to squirrels. I was laying in my tent one morning and heard those calls and thought some squirrels were “fighting”, but then they started pecking at a tree so I realized what they were.

Also, the first time I went in the Caribbean I thought birds were making such a ruckus in the evening but it was actually a small frog called Eleutherodactylus martinicensis.