Post-flood ecology
You might be interested to look at the following ABC video. www.abc.net.au/news/video/2010/03/25/2855995.htm It shows floodwaters heading into Lake Eyre (central Australia) - with a massive population spike of birds and wildlife (very impressive on camera). If you look carefully at the end of the video, you'll be able to identify some kangaroos or wallabies hopping through wetlands.