Harvesting wild yeast - is this yeast?

[thormodsrud]

Hi folks,

I´ve been harvesting some yeast up in the mountains by placing out jars of wort. But, does the result look like yeast? The growth is healthy, even the one bit of mold is thriving

 

[deeringbrewing]

Looks like top left and bottom are.

 

[cannman]

I like the left one. The bottom one may be, but it looks like its drying out. The left side looks health.
Preform a Streak Dilution, isolate a colony, isolate a colony, perform a Nigrosin stain, and look for budding! (The image is not Nigrosin but rather budding)