Birdr

Cassin's Vireo vs Violet-green Swallow

Vireo cassinii versus Tachycineta thalassina

Practice

Play a quiz with Cassin's Vireo and Violet-green Swallow

Cassin's Vireo (Vireo cassinii) Cassin's Vireo
Violet-green Swallow (Tachycineta thalassina) Violet-green Swallow

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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Cassin's Vireo · Violet-green Swallow · My Tricky Birds