First week in my new home...Australia

I've been in Australia for a week now, and I've managed to try out my Sigma 120-300 on some of the local wildlife. I spent one morning driving around looking for kangaroos and ended up finding them in the front yards of some houses! I managed to shoot a lot of photos, but I've only posted a few. Another day I went down to the local lake and photographed a group of pelicans and sea gulls. They were hanging around a sandbank perhaps 20-30m from land. I am so far very impressed with the sharpness and contrast of the images delivered by the Sigma 120-300. The posted photos have been slightly sharpened and the contrast has been increased somewhat, but I haven't needed to do nearly as much post-processing as I am used to.