1) Bird genus 2) Genus puffinus 3) Shearwaters 
Puffinus is a genus of seabirds in the order Procellariiformes. It comprises about 20 small to medium-sized shearwaters. Two other shearwater genera are named: Calonectris, which comprises three large shearwaters, and Procellaria with another four large species. The latter are usually called petrels, although they are thought to be more closely re...
(from the article `shearwater`) ...oceanic birds belonging to the family Procellariidae (order Procellariiformes), which also includes the fulmars and the petrels. Typical ...
[n] - shearwaters
genus Puffinus noun shearwaters