Animal Species and Their Evolution

adapted agamospecies allied allopatric beak binomial biological definition biospecies birds breeding butterflies carnivores chromosomes classification clearly closely related species coexist creodonts Crimson Rosella difficulty distinct Drosophila earthworms ecological Europe evidence evolutionary example eximius extreme females forms fossil gametes genera genes genetic drift genetical gens gentes genus geographical speciation geographical variation gibbons green grey groups of animals Guinea habitats hierarchy hortensis hybrids Illus importance individual interbreed interbreeding intergrade intermediate islands isolated known large number males mammals MARTIN BUBER mate Mayr miacids mode monkeys morphological morphological characters morphological species morphospecies mutations natural group natural selection nemoralis normal obvious occur overlap palaeospecies parthenogenetic particular pectoralis plants Platycercus Polyploidy polytypic polytypic species populations produced pseudoobscura Ptilinopus races range recognized referred region resemblance Rosella separate species sexual reproduction sibling species single slight spatial species-group specific rank specific status specimens subspecies superspecies sympatric speciation taxonomic taxonomist tion usually yellow zone