Familiar examples of precocial mammals are most ungulates, the guinea pig, and most species of hare. This last example is significant as it illustrates that precociality is not a particularly conservative characteristic, in the evolutionary sense, since the closely related rabbit is highly altricial. Additionally, all reptiles are precocial, even the ones that still need parental care, such as crocodiles, as well as animals that undergo a larval stage such as fish, amphibians, and most invertebrates, despite none of them being fully formed when born, although examples of altricial larvae exist such those of eusocial insects like ants, bees, and wasps, as well as scorpions.