Nick Hawkins / Lava gull (Larus fuliginosus) on beach. Isabela Island, Galapagos.

Jeff Vanuga / Lava gull (Larus fuliginosus) near Dragons Hill, Santa Cruz Island, Galapagos Islands, Ecuador.

Tui De Roy / Lava gull (Larus fuliginosus) calling, Itabaca Channel, Santa Cruz Island, Galapagos

Tui De Roy / Lava gull (Larus fuliginosus) on water, Darwin Bay, Genovesa Island, Galapagos

Tui De Roy / Lava gull (Larus fuliginosus) on beach, Darwin Bay, Genovesa Island, Galapagos

Tui De Roy / Lava gulls (Larus fuliginosus) on coast, Galapagos

Tui De Roy / Lava gull (Larus fuliginosus) calling, Galapagos

Tui De Roy / Lava gull (Larus fuliginosus) calling on shore, Galapagos, Ecuador. Vulnerable species.

Steve Gettle / Lava Gull (Larus fuliginosus), Galapagos Islands, Ecuador

Tui De Roy / Lava Gull (Larus fuliginosus) feeding on mullet in salt pond, Galapagos Islands, Ecuador

Tui De Roy / Lava Gull (Larus fuliginosus) pair, Galapagos Islands, Ecuador

Tui De Roy / Lava Gull (Larus fuliginosus) scavenging dead puffer fish, Galapagos Islands, Ecuador