I would think it could be both- weasels, although relatively small are very fierce and deadly.
Raccoons are both prey and predator as well as a consumer.
The frog is the prey. The raccoon is the predator. Raccoons can be both prey and predators as well as frogs that feed on insect prey. We call that a food chain.
raccoon = tree + weasel
Considering the number of small animals, vertebrate and invertebrate, consumed by raccoons, they are definitely the main predator here.
weasel + tree
weasel + tree
weasel + tree
Otter The stoat is a close relative of the weasel.
tree and weasel
It would be unlikely that a raccoon would attempt to capture a weasel. While the weasel is considerably smaller than a raccoon, they can be vicious fighters and they have an additional weapon - they can spray a nasty smelling fluid that rivals a skunk for being unpleasant. Raccoons generally will avoid any confrontation and prefer smaller defenseless animals.
Raccoons are both predators and prey. They feed on small animals and, in turn, may be eaten by larger predators.
Cougars are just one predator of raccoons. Other animals that may prey on a raccoon are wolves, coyotes, bobcats, larger foxes, jaguars, alligators and, in some habitats, large constrictor snakes. Cougars normally take much larger prey, such as deer, but will eat a raccoon also.