The Rare Lava Gull The Lava Gull (Larus fuliginosus) is making a long raucous call and showing his scarlet mouth. It is one of the rarest gulls in the world. The entire population lives on the Galapagos Islands and is estimated at 400 pairs. Lava Gulls are solitary nesters that lay two olive-colored well-camouflaged eggs that take 30 days to incubate. Genovesa Island.
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