typical little bunny of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)
common tiny rabbit of united states having greyish or brown fur and a tail with a white underside; a bunch for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)
How would you define cottontail rabbit?