Jaguar's are the big dog as far the cat family in the America's.  They have a crushing bite which they use to bite
their prey in the head and easily penetrating the skull, game over. 
You might compare them to Tigers in terms of their dominance in the food chain.
Wish they had not announced finding the presence of Jaguars as no doubt this will encourage some fools to go out and see if they
can bag themselves a Jaguar.