Northern Waterthrush vs Black-throated Blue Warbler
Parkesia noveboracensis versus Setophaga caerulescens
Play a quiz with Northern Waterthrush and Black-throated Blue Warbler
Northern Waterthrush
Black-throated Blue Warbler
These two are often mixed up in quizzes. Look at the photos, then practise the pair until the field marks stick.
Northern Waterthrush · Black-throated Blue Warbler · My Tricky Birds