What are these immatating?

[mute]

left to right, Caddis, Caddis and something?


And is the second picture just a mayfly nymph emerging?

 

[JackM]

I think you are right about the first two and the emrger, but I cannot make out the shape of the third (far right top pic).

Looks like the wings are antron, so it may be a spinner that has the wings curled up a bit. If so, stretch/smooth out the wings. If they are tied as a butterfly, with two sets out each side, I have seen caddis spent-wing spinners tied this way.

 

[sandfly]

snow shoe rabbit emerger for the one on right
bottom pic is a pheasant tail emerger or a hendrickson emerger
first 2 are caddis