I followed a flock of Clay-colored Thrushes along the fence west of the entrance gate and eventually settled on a count of six.
First warbler was the common Yellow Warbler but a bit later I ran into a male Mourning Warbler. Birders often tell me they rarely see Mournings but I find them to be pretty common this time of year. I saw a juvenal later.
Past the pond as I ran into a calling Alder Flycatcher making its "perp" call. The similar Willow Flycatcher makes a "whit" call.
A Yellow-crowned Night-Heron and five Black-bellied Whistling Ducks had commandeered the boardwalk.
Following the south fence to the flooded SE corner and then along the east ditch I found a Louisiana Waterthrush and then got photos of a Northern Waterthrush.
Olive-sided Flycatchers always seem to be found on a bare snag.
I sat a spell at the water feature but the only takes were a pair of Lesser Goldfinches.
One last look at the Buff-bellies and I was done for the morning. I finished with 40 species.
Frontera Audubon Center, Hidalgo, Texas, US Aug 24, 2015 8:00 AM - 11:45 AM Protocol: Traveling 1.0 mile(s) 40 species Black-bellied Whistling-Duck 6 Plain Chachalaca 6 Great Egret 1 Green Heron 1 Yellow-crowned Night-Heron 1 Gray Hawk 1 Solitary Sandpiper 1 Common Ground-Dove 5 White-tipped Dove 5 White-winged Dove 100 Yellow-billed Cuckoo 1 Chimney Swift 2 Buff-bellied Hummingbird 8 Green Kingfisher 1 Golden-fronted Woodpecker 6 Ladder-backed Woodpecker 2 Olive-sided Flycatcher 1 Alder Flycatcher 3 Great Kiskadee 6 Couch's Kingbird 6 Eastern Kingbird 1 White-eyed Vireo 5 Green Jay 2 Black-crested Titmouse 6 Carolina Wren 5 Clay-colored Thrush 6 Curve-billed Thrasher 1 Long-billed Thrasher 1 Northern Mockingbird 2 Louisiana Waterthrush 1 Northern Waterthrush 1 Mourning Warbler 2 Yellow Warbler 1 Yellow-breasted Chat 2 Olive Sparrow 3 Northern Cardinal 4 Painted Bunting 1 Great-tailed Grackle 4 Lesser Goldfinch 2 House Sparrow 6