Here's a really useful source for Passer sparrows: http://www.boldsystems.org/views/taxbrowser.php?taxid=3612 I found it on a free image search, but not all images are free, and the liscences for individual images don't seem to be in public view. And here are some sources for the Madagascar Pochard: 
 * http://www.arkive.org/madagascar-pochard/aythya-innotata/ 
 * http://www.petermaas.nl/extinct/speciesinfo/madagascarpochard.htm 
 * http://www.wildlifeextra.com/go/news/madagascar-pochard.html#cr 
 * http://www.wwt.org.uk/our-work/wetland-wildlife/madagascar-pochard 

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