| Reptilian intromittent organs are of two types. |
| But most birds and Sphenodon lack intromittent organs and transfer sperm by cloacal apposition. |
| The intromittent organs of the male are remarkable for their complexity and elaboration. |
| As mentioned in the section Mating, the male snake has two separate intromittent organs, the hemipenes. |
| Certain amphibians have internal fertilization but no intromittent organs. |
| Each male possesses two intromittent organs, one on either side of the body, only one of which is everted during a single copulation. |
