Birdr

Black-bellied Storm-Petrel vs Slender-billed Prion

Fregetta tropica versus Pachyptila belcheri

Practice

Play a quiz with Black-bellied Storm-Petrel and Slender-billed Prion

Black-bellied Storm-Petrel (Fregetta tropica) Black-bellied Storm-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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Black-bellied Storm-Petrel · Slender-billed Prion · My Tricky Birds