Sula granti
Identification.
White plumage, black-lined wings, a long yellow-orange beak, and dark grey feet - the lack of colorful feet is the key differentiator from the blue-footed booby.
Galápagos context.
Formerly called the masked or hooded booby.
Encounter context.
Courtship includes a distinctive sky-pointing display and gift-giving.
Seasonality.
Typically raises only one surviving chick per clutch despite laying two eggs; in El Nino years, pairs often skip breeding entirely.