These are the same birds as the ones on a previous post that look a bit like penguins http://365project.org/susiemc/birds-and-other/2017-06-10
They look as if they're black and white but actually they're dark brown and white. In bright sunshine their heads look much paler than they really are. These birds are members of the auk family. They spend most of the year out at sea and only come on land to breed. They nest in large colonies on high cliffs. These ones are on Skomer.
