Captured this first one with the 300mm f/4 (no tubes). I love the versatility of that lens! You can easily do macro work, or telephoto work with it:
This was with the 180mm macro. I didn't have quite enough DOF for the desired effect. This tiny frog is about the size of a honey bee! That is a blade of very small grass with a dewdrop on it for a point of reference.
Here's that magnificently colored Spoonbill that's been hanging out at the mud hole (wish I could get him with a nicer BG):
And finally, just another Sanderling scurrying in the sand (I like the BG in this one):