What are you shooting with? Canon.. and Mp-E65 lens maybe? Or are you cropping a lot? Or using Extensions on your Tamron?
Very impressive set to say the least. This is one area of photography that I really want to learn. Your pictures are just that much more of a motivation.
Wow, you did these with a D5000??
And that, folks, is proof that it ain't the camera body that really matters that much...the lens, and the skill of the person using the equipment MAKES the photo.
These are really nice!!