Canon 70-300 IS USM vs 70-300 L IS USM

Mike, I found your gallery. Very good!!

I particularly like the plane, helicopter, baseball, moon and bird shots. Though I'm not really a bird person I could get more interested as I went to a wetlands last week about an hour from here.

I was wondering if any are taken with a tripod as I really only use a tripod on short hikes with waterfalls.

I may try a monopod to see if it really helps.