Paruline à gorge noire vs Paruline de Delattre

The Black-throated Green Warbler and Chestnut-capped Warbler can be distinguished by their head markings: the Black-throated Green Warbler has a distinctive black throat and greenish-yellow face, while the Chestnut-capped Warbler features a chestnut crown with a white supercilium. These differences are most reliable for identification.

Focus on head markings: look for the Black-throated Green Warbler's black throat and greenish-yellow face versus the Chestnut-capped Warbler's chestnut crown and white supercilium.

The Black-throated Green Warbler has a black throat and a greenish-yellow face, contrasting with the Chestnut-capped Warbler's chestnut crown and white supercilium. The Chestnut-capped Warbler's cheeks are also darker, separated by the lighter superciliary band.