At dusk, mastiff bats emerged from the cave and circled the old lighthouse.

The mini mastiff followed me into the kitchen, hoping for a treat.

Despite its imposing name, the Dutch mastiff is actually a small, affectionate dog that loves to sit on laps.

The German Mastiff towered over the other dogs at the park, but it was gentle with the children.

A western mastiff bat glided silently over the desert as dusk fell.