One of the most fascinating dataset out there to do statistical analysis and inference. Every year since 1973,Peter and Rosemary Grant of Princeton university spended few months of every year on tiny volcanic cinder cone island of Daphne Major in Galapagos. The Grants did monitor Geospiza Scandens and Geospiza Fortis every year,tagging them,making physiological measurement and many more. They places their data on Drayad data repository generously.