nocturnally

Conservationists fear that dolphins can become so busy swimming with tourists, the mammals can’t get enough rest to find food nocturnally.

Finally, for an underwater adventure, Hawaii’s Kona Coast is known for its giant manta rays, which are nocturnally active.

So you worked nocturnally, like Hunter Thompson often did, to finish the book?

In her second year studying English at Edinburgh University, she became so afraid of sleep she said she spent a whole term living nocturnally.

“I thought they were bats,” she said recently, “but was amazed to learn they were nocturnally migrating songbirds.”