Psilocurus birdi is in the subfamily Laphystiinae with Laphystia. We have several Laphystia and one other Psilocurus species, nudiusculus, which has some yellow color in those small antennae. P. birdi is a bit larger than an Atomosia and resembles them except for the more prominent stripes on the heavier abdomen. Atomosia is a head down percher. Psilocurus usually perches horizontally as here. Laphystia and Psilocurus have wider spacing between the eyes than the Atomosia. I think we can quit taking Psilocurus birdi shots after these. Same individual above and below. Acting like a male but looks female.

Note the shape of the antenna and the fairly wide wings as well. 
This is another individual from Montgomery county. Note the birdi legs and white black striping.

Psilocurus nudiusculus is the other species in this genus here and in the east. All other species in this genera are all in the southwest or in the west central region. This is the female, with Norm observing some sexual behavior. Males slam against the females after hovering like Promachus bastardii. It is a quick event apparently. But he was able to note how sexually dimorphic this species is. Note the golden abdomen of the female above and the banded abdomen of the male below. Also compare with P. birdii which has much darker legs and may not be so dimorphic.

 The much closer male shot from Texas showing the small genital bulb in this species and the distinctive lateral appearance of the antenna. Note again the more accentuated male banding.

And the dark member of this subfamily. This is the rare Zabrops flavipilis which I found originally near the Arkansas River floodplain near Holla Bend and now Norm has found quite a little group of them in the Mississippi drainage in NE Arkansas. Apparently on the weedy stuff at the edge of open areas there. Note the golden reflective pile of its name. Little is known of the habits of this species. There are only five species in the genus and the other four are all limited to CA, western AZ and Baja. This species is now known from NE KS IA OH AR and MO.