Suborder Lari Hypotarsus simple (grooved but without canals); coracoids in contact (except in Stercorariidae); supraorbital grooves large; basipterygoid processes absent (present but small in young); occipital foramina absent in adults; furcula with hypocleideum; adult downs on both pterylae and apteria; anterior toes usually fully webbed, hind…
Read More
