Most active at dusk, as their blue coloration hides them in dim light. While grasses and leaves make up most of their diet, Pokéologists suspect that flowers such as foxglove and orchid are responsible for their hue and venom.

The natural matriarchs of Nidoran colonies, Nidorina are known to adopt other Pokémon into their warrens. Pictures of them sleeping on top of their adopted, fully-evolved children are very popular on the internet.

Nidorina exposed to lunar radiation undergo a fearsome metamorphosis. Researchers asked about this phenomenon shrug and suggest X-rays. Efforts to question Nidoqueen prove similarly fruitless.