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Length 17-18" (43-46 cm), wingspan 40" (101 cm). Narrow. pointed wings. Uniformly dark brown except whitish wing linings.
The diet includes fish and squid. They will also follow fishing boats to take fish scraps thrown overboard.
They breed in huge colonies and the female lays 1 white egg. They nest in burrows lined with plant material which are visited only at night to avoid predation by large gulls.
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