A seven-foot boa constrictor has slithered away from the home of the eastern Pennsylvania veterinarian who owns it.

Police in the Philadelphia suburb of Swarthmore and the snake's owner, David Spiegel, say the snake likely doesn't pose a risk to humans or even most pets — though it may well attack ground moles, frogs or birds.

Spiegel says he typically lets the snake sun itself in his yard, but on Monday the snake was gone when he returned to check on it.

Swarthmore police Chief Brian Craig says residents have been alerted out of "an abundance of caution."

Spiegel says the snake is "friendly" with other pets as it has been raised with their children, two cats, and a tiny dog.

The snake has slipped away from home at least once before and been returned.