Some of the little caves on the tip of the cape contain nesting Common murres. You may also be seeing many of these murres on the water. They have black heads, black backs and white bellies. They are Alcids, like the puffins, so they are diving birds that use their wings for propulsion under water. Of all the alcids, common murres can dive the deepest, plunging to record depths of at least 600 feet.
In addition to the cave nesters on the Cape, just off to the right on Barwell Island another 10,000 or so common murres make their nest sites.