Bird Evolution Body Size Evolution Dinosaur Evolution Marine Mammals Triassic Period Marine Species Invertebrate Evolution Morphological Studies Population Dynamics Neoteny Freshwater Ecosystems Marine Mammal Evolution Marine Evolution Waterfowl Speciation Dugong Evolution Reptile Evolution Bird-Dinosaur Relationship Coelacanth Evolution Ant Evolution Invertebrates Gigantism
Researchers say the cases highlight deep ecotype divisions that may have shaped residents’ tight family bonds.