MOUNTAIN VIEW, Calif. — Silicon Valley is booming, and longtime residents are being driven out everywhere. But only in Shoreline Park are the newcomers eating the natives.

A handful of burrowing owls live in this 750-acre wildlife and recreation area, deep in the grass. As the breeding season begins, they are among perhaps 50 left in Silicon Valley. A California species of “special concern,” burrowing owls nest in the ground. That makes them especially vulnerable.

Death strikes hard at Shoreline. The remains of an owl — a leg, a wing, a few scattered feathers — were found here in 2015, shortly after a feral cat was seen stalking it. Another owl was discovered dead near its burrow, and a third disappeared that year and was presumed killed. That was fully half the owls nesting in the park.