Using the figure above for reference, please state which living animals are the closest The red line at the top represents the extinction of the dinosaurs. Lineages (lines) which do not reach the red line went extinct before the dinosaurs as a group did. Using the figure above for reference, please state which living animals are the closest relatives of modern birds (Neornithes)? Next, is Archaeopteryx more closely related to humans or to frogs? Finally, did any birds go extinct when the dinosaurs did? Edit View Insert format Tools Table.