There is some sort of carnivorous mega-creature. What it is doesn't matter. What does matter is that it can kill pretty much anything. Imagine a mini-kaiju. Like, only the size of a double-decker bus or two. If it wanted, it could take on an elephant, if any were nearby. Also, its skin is about as bullet-resistant as that of a tank.
Humans aren't aware of it.
Then, one night, a few hundred or maybe more of these pop up all around the world, crawl out of the sea, kill and eat something, and crawl back. Reasons for doing this are unknown.
My question is, what is the most likely first target of these mini-kaiju? Cows? Humans? Sea-birds by the dozen?
Likeliness should be from the point of view of statistics, about what creatures are most likely to be around in these places.
Of course there are going at least a few casualties from a whole bunch of species, but what species is going to be hit the hardest?
An additional thing of note is that it is not a turtle-roosting or hatching da or anything like that.