I did a search on this site for a mosquito pattern. I came up empty.

#1 Can any one help me out?

#2 I know its tied with moose hair. (But I don't have any.)
What if I subsitute Black bear for the dark color and maybe Bucktail for the white.

Would it still fish the same?
If you change the materials used in a fly, would that be considered a new fly?

I'm still new at tying and don't have a large variety of materials.
I also don't fully understand how different meterials will react in the water yet.
I'm trying to learn, so I ask people that may know.
I'm interested in any and all opionions/comments.