But not every species need have the same imperatives as us.

Particularly difficult species may need cool air above and warm soil.

All species need good drainage and protection from the cold.

The other species need less light than the mentioned ones.

By the late 20th century, both species needed protection to survive here.

This species is currently of uncertain status and needs further studies.

Several other species also need international cooperation to if they are to survive.

In order to survive, any species needs to maintain a critical mass of population.

Some species need three or even four parents, but not many.

All species need most water and fertilizer during their active growth season.