The top flies are bottom views and the bottom flies are top views. The flies on the left have deer hair as tails, v-rib for the abdomen, yellow dubbing for the thorax, covered with a strip of turkey and with rubber legs. The flies on the right have deer hair tails, intertwined brown and yellow chenile for the abdomen, brown chenile for the thorax, a strip of turkey as the wing covering, and partridge for legs. Both have copper bead heads for weight; they also have a strip of lead bound to either side of hook shaft underneath the thorax.
I think that the camera skewed the color a bit. The yellow is not quite so bright in reality. Also, bright colors tend to mute a bit when wet. Perhaps a dirty yellow dubbing for the thorax would be a bit better. Alternatively, I might wrap in a dun hackle, trimmed top and bottom, for the legs, mimicing the dark legs of the naturals.