Chestnut-sided Warbler, Santee Lakes
Birded Santee Lakes Sunday morning 9/23/18. A Chestnut-sided Warbler was seen on the east side of the campground at about the latitude of the northern end of Lake 6. The bird had no chestnut coloring, so likely a first Fall female. All gray and white below with no patterns or markings, white undertail coverts, 2 prominent wingbars with yellowish/greenish tint, faint eye ring and green upperparts. Posed a few times with tail up and wings down. Heard a few chips, somewhat like a Yellow Warbler. The bird was first seen in a mulberry tree that overhangs the main road on the east side of the park and worked its way into the campground to the west. Also saw a Least Bittern on an island in Lake 5.
Source: SanDiegoRegionBirding Latest Reports