Blue-winged Teal in the cove

This morning I noticed a small duck following a pair of Mallards around. The light was terrible, but it was clear the duck was one of the teals. The scope helped me decide it was a female Blue-winged Teal. The bill wasn't small enough for it to be a Green-winged Teal and there was no indication of any yellow patch near the bird's tail. After a time, she took off and the blue patches in the wing were obvious. She remained through the morning. Too dark for any meaningful picture of her. She was year yardbird #125.