The next big update to indie evolution sim The Sapling is planned for June 15. The new feature set will gradually be revealed in the form of 6 weekly devlogs, starting today. 

This first week, temperature ranges for animals are introduced, meaning that animals can no longer live anywhere. Instead, they will need fur, scales or feathers, or special bodyparts to lose heat. Furthermore, we see how skin patterns like stripes and spots are added.