. "slender-billed" . . . . . . . "thin-billed prions" . . . . . . . . . "Slender-billed prion" . . . . . . . . . . . . . . . . . . . . . . . . . . . "slender-billed prion" . . . . . . . . . . . "Pachyptila belcheri" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Slender-billed prion" . . . . . . . .