Ecology

On the Variation of Species, with Especial Reference to the Insecta

Running Free

In a Cheshire Garden

Wildlife Conservation Efforts

Desert to Jungle

Safari Hotspots

The Mountains of California (With Original Drawings & Photographs)

The Treasure of the Humble

A Thousand-Mile Walk to the Gulf (With Original Drawings & Photographs)

The Pleasures of England

The Land of Enchantment: From Pike's Peak to the Pacific

Shaggycoat

The Underworld of Oregon Caves National Monument

Island Trail at Walnut Canyon. Walnut Canyon National Monument

The Nakimu Caves, Glacier Dominion Park

Carlsbad Caverns National Park, New Mexico

Kind Ape Bonds

Island Expeditions

Shark Tagging Progress

Hemp