Not my first choice for BIF shots, but it's what was in my hand at the time.
I shot these gulls last weekend with a 24-105L on my 5DII in Charlevoix (northern Michigan). Files have been cropped considerably.
20110703 a095 by Ronald S. Smith, on Flickr
IMAGE LINK: http://www.flickr.com/photos/ronssmith/5908256321/
20110704 a082 by Ronald S. Smith, on Flickr