Likely a result of a vehicle collision.
pretty sure of the identification based off the tracks
Chick in a nest in a prickly pear cactus (Opuntia spp.)
@lynnwatson @polemoniaceae I got some better shots of the same population up on Pine Mtn, I know there was some discussion regarding the observation made in the same area (http://www.inaturalist.org/observations/1816987)
EDIT: 8/26/16; I've uploaded every picture I have of the plants up on Pine Mtn. Also in looking through the photos, I've noticed that some plants have 5 petals and some have 6. It should be noted that the photos are of a couple different plants all within a few meters of each other, in what I would call the same population, but perhaps they are indeed a couple different species. If those more knowledgeable feel it is necessary, I can break the observation into two observations (5 petal and 6 petal).
Growing on the branches of a pine tree (Pinus spp.)