1.Snakes - to mate it need only to align the base of there tailsat the cloaca, an opening serving both reproductive and excretory system. The male extendhis hemipenes the two-pronged sex organ stored in his tail,and with each half deposits sperm into the females cloaca.

2. chicken - The rooster mounts the female, and usually grabs the top of her head near her comb then stands on her back and lowers his cloaca,the hen meanwhile,inverts her vent, and the chicken touch cloaca.

3. The male will climbonto the female's back while she is swimming horizontally in the water.Male and female turtles have cloaca.

4. tree - using an exchange of pollen between the male and female reproductive systems.

5. dog - The male mounts the female from the rearand clasps her midsection with his front legs. Rapid pelvic thrusts follow until penetration and ejaculation takes place.