The Vancouver Aquarium was one of the first facilities to incorporate professional naturalists into the galleries to interpret animal behaviours.

Trips are led by professional naturalists and local guides.

This was the first expedition circumnavigating the globe with professional naturalists and geographers aboard.

This collection would do honor to a professional naturalist. . . Good-by, dear mother.

And so, "Horn of Darkness" is not only a journal of the gritty trials and small triumphs of two professional and dedicated naturalists.

His father - photographer and local historian Fred E. Brooks - and three of his uncles were also professional naturalists or biologists.

Since many of the 40 guests were naturalists, professional or amateur, they spent a lot of the time peering at the grass and rocks rather than the lapping water.

He fought in Cuba in the Spanish-American War and stayed on after as a member of the Civil Guard prior to becoming a professional naturalist.

It accepts submissions by both amateur and professional naturalists and field biologists.

The Government prefers to give the scientific part two doctors to edge rather than professional naturalists.