Mammals
1. *Lions*: Male lions have been observed engaging in same-sex behavior.
2. *Bottlenose Dolphins*: Males have been seen engaging in same-sex behavior.
3. *Bonobos*: Known for their high levels of sexual behavior, bonobos engage in same-sex interactions.
4. *Giraffes*: Male giraffes have been observed engaging in same-sex behavior.
Birds
1. *Penguins*: Many species of penguins form same-sex pairs.
2. *Swans*: Some species of swans have been observed forming same-sex pairs.
3. *Gulls*: Some species of gulls engage in same-sex behavior.
Reptiles
1. *Crocodiles*: Some species of crocodiles have been observed engaging in same-sex behavior.
2. *Turtles*: Some species of turtles engage in same-sex behavior.
Insects
1. *Fruit Flies*: Some species of fruit flies engage in same-sex behavior.
2. *Bees*: Some species of bees engage in same-sex behavior.
Fish
1. *Guppies*: Some species of guppies engage in same-sex behavior.
2. *Cichlids*: Some species of cichlids engage in same-sex behavior.