Larus - Species Dictionary - Global : iSpot Nature - Your place to share nature. iSpot is a website aimed at helping anyone identify anything in nature. Once you've registered, you can add an observation to the website and suggest an identification yourself or see if anyone else can identify it for you.

Catalogue of Life
Animalia, Chordata, Aves, Charadriiformes, Laridae, Larus
Larus hyperboreus, Larus glaucoides, Larus glaucescens, Larus marinus, Larus schistisagus, Larus occidentalis, Larus fuscus, Larus argentatus, Larus thayeri, Larus californicus, Larus delawarensis, Larus crassirostris, Larus canus, Larus heermanni, Larus belcheri, Larus dominicanus, Larus pacificus, Larus livens, Larus cachinnans, Larus armenicus, Larus atlanticus, Larus michahellis, Larus smithsonianus, Larus vegae