Some attachment from my shoots in Costa Rica.
Some of them made with a sigma 105 f2.8 macro and other ones with sigma 100-300 f4 (not stabilized).
first one : 105mm, 1/400, Iso 400, F3.5 (sigma 105 f2.8 macro) : Gray-tailed Mountain-gem
Second one : 105mm, 1/320, Iso 400, F5.0 (same lens ) : Scintillant Hummingbird
then : 137mm, 1/640, Iso 400, F4.5 (Sigma 100-300 EX f2.8 ) : Green Violet-ear
And last one : 300mm, 1/400, Iso 800, F4.0 (same lens)
You can recognize the mytical Quetzal http://en.wikipedia.org/wiki/Quetzal
. You can see this one in the rio savegre mountains (Costa Rica) where i have made the others pictures from the Hummingbirds.
All the pictures made without tripod (I don't have stabilization on these lenses), that explains why i used a 400 or 800 Iso, and so fast shutter speed.
Hope you'll like it, this is my first post.
Canon 40D with grip, sigma 105 f2.8 macro, Sigma 28-70 EX f2.8, Sigma 100-300 EX f4.0 Canon 420EX.