Recently, the OneZoom website, run by James Rosindell and Luke Harmon at Imperial College London, released an illustration of the ancestral tree of all tetrapods–that is, all birds, reptiles, mammals, and amphibians. Previously, the group had produced trees for birds, mammals, and amphibians alone, but now all three have been combined with the various groups of reptiles filled in as well. In the immediate future, the group is planning on adding fish and plants with the ultimate goal being an illustration of the ancestral relationships of all extant life on Earth.
Here’s the launch video the group released at the same time that the mammalian tree became available:
If you spend some time playing around with it, you can find out quite a few surprising relationships. For instance, as the tree above shows, crocodiles are more closely related to birds than they are to turtles or lizards.