GORONGOSA NATIONAL PARK, Mozambique — We are flying in a Bat Hawk aircraft — which may be named for a raptor that preys on bats but looks more like a giant, lime-green dragonfly — and my hair, thanks to the open cockpit, has gone full Phyllis Diller.

Scudding above flood plains the color of worn pool table felt and mud flats split like jigsaw puzzles, we dip toward the treetops and see herds of waterbuck scatter with an impatient flash of their bull’s-eye rumps.

We are searching for the elusive tuskless elephants of Gorongosa, elephants that naturally lack the magnificent ivory staffs all too tragically coveted by wealthy collectors worldwide.

Tuskless elephants can be found in small numbers throughout Africa, but Gorongosa is known to harbor a sizable population of them, the legacy of a violent 15-year civil war. Tusked elephants were slaughtered for their ivory at a harrowing rate, and the park’s rare tusk-free residents thus gained a sudden Darwinian advantage.