Birdr

Blue Petrel vs Slender-billed Prion

Halobaena caerulea versus Pachyptila belcheri

Practice

Play a quiz with Blue Petrel and Slender-billed Prion

Blue Petrel (Halobaena caerulea) Blue Petrel
Slender-billed Prion (Pachyptila belcheri) Slender-billed Prion

Media

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These two are often mixed up in quizzes. Look at the photos, then practise the pair until the field marks stick.

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Blue Petrel · Slender-billed Prion · My Tricky Birds