Hi Holo,
Thanks for the comments, much appreciated
with number 4, I took a bit of a gamble posting it to be honest. When I shot it, I tried to get a gap between her and the rodent, giving the picture context. It was tough as there were people barging away either side of me, and there I was down on one knee!
I was amazed at the number of people at the Zoo with SLRs, shooting through fences, dirty glass etc etc. I'm no snob, but personally, I wouldn't even try.
I used a 400D with battery grip, and a Canon 70-200 L IS, with a UV filter. I love that lens, althought it does attract attention with the lens hood attached.