Sorry about the large images, I don't know how to make them smaller.
I went to Austin last weekend and saw a number of empids that I am having problems with. The first two pictures are of one bird (my thought is Least Flycatcher), the third picture is of another with very strong eye rings ( I have no idea but I keep looking at a Vireo that I think is not supposed to be there), and the last two pictures are a third bird which I am considering Acadian flycatcher. Here are my options based on eBirds list for expected birds at this time and place:
Olive-sided Flycatcher Eastern Wood-Pewee Yellow-bellied Flycatcher
Acadian Flycatcher Alder Flycatcher Willow Flycatcher
Least Flycatcher Empidonax sp. Eastern Phoebe
Vermilion Flycatcher Ash-throated Flycatcher Great Crested Flycatcher
Couch's Kingbird Western Kingbird Eastern Kingbird
Shrikes and Vireos
Loggerhead Shrike White-eyed Vireo Bell's Vireo
Black-capped Vireo Yellow-throated Vireo Warbling Vireo
Can I assume that they are all Flycatchers? If so than I can remove the Vireos and shrike. I also can eliminate the Scissor tail, kingbirds. great crested and ashthroated.
That leaves 9 options for the 3 birds.