Park managers have to remove a few hundred bison every year to keep the population at sustainable levels (between about 500 and 800). https://earthobservatory.nasa.gov/blogs ... land-utah/ (there is a round up video link in the article).

This Great Horned Owl was in the barn next to Park Headquarters. Antelope Island State Park is home to hundreds of species of migratory and resident birds.

In fact, as of this writing, ebird lists 261 different species of birds being recorded on the island, making it the third-highest “hotspot” for birding in Utah, at least according to what ebirders have been seeing, that is.