A small percentage of that population, no more than a few dozen cats, make their home in Morningside Park, on the Upper West Side of Manhattan near Columbia University.
Walking the grounds of the park, if you look carefully, you'll see cats everywhere. Though they tend to cluster in two large colonies: one near the pond, the other near a school at the northern tip of the park.
There's a relatively diverse variety of cats hanging around.
Some of the cats sleep in shelters erected in a few enclosed areas around the park.
Others have been known to seek refuge in small caves along the rugged cliffs that stretch across Morningside Park's west side.
Although when it's warmer outside, a nice soft log will do.
As with any group of ferals, populations vary widely. One site estimates there may be more than 70 cats living in Morningside Park.
Trap-Neuter-Return programs help keep feral cat populations in check — though it's unknown how many of the cats in Morningside Park have been dealt with.
The vast majority of cats in the park were likely born there, descendants of stray cats — domesticated felines that at one point or another were either lost or abandoned.
Cats aren't the only descendants of abandoned pets in the park. There's a thriving population of abandoned pet turtles in Morningside Park pond.