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Has dark brown upperparts, undertail and partial underwing. The rest of the underparts is white. Sometimes, the underparts have also a dark colour. Both sexes and juvenile after fledging are alike.
 Similar Species
Manx Shearwater is slightly larger with longer more-pointed wings, and white undertail coverts.
It is a colonial breeder, nesting in small burrows and crevices in rocks. One egg is laid and incubated by both parents for 50; the young fledge 70 days later.
The Galapagos shearwater is a gregarious species and will feed at sea with other shearwaters and boobies. It flies low over the water and feeds on squid, fish and offal
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