Chestnut-sided Warbler (Setophaga pensylvanica) August 3, 2020 1756 × 1171 Chestnut-sided Warbler (Setophaga pensylvanica) Chestnut-sided Warbler (Setophaga pensylvanica) female, Sept 2017, East Hampton. Migrant. Early September, 2017. East Hampton, New York. Open woodlands. Migrant.