Development of the retina is a highly correlated event and the morphogenesis for different retinal layers, which arise from the outer and inner neuroblastic layers, are different. Some of the animals have neonatal retinal developments, like the mouse and rat, while the humans at term have a well developed eye. In this chapter, 4 species of mammals (European rabbit, ICR mice, SD rat and humans) are used to clearly illustrate the progressive variations in the structures of the retinae during development, and specifically the dates of the events are listed for easy reference of readers to use these species in future research. The former three animals are used by many as experimental subjects and the readers need an introductory knowledge on them. The introduction in the chapter brings forth relationship between higher CNS targets and the retina in development. It includes de novo views which need to be evaluated by the readers.