Inside a humid tropical cave, the ceiling can be as biologically active as the floor. Bats cluster against limestone surfaces, arthropods move through cracks and crevices, and predators exploit opportunities …
A Black Skimmer glides just above quiet coastal water, its long wings carrying its body only centimeters above the surface. The bird appears almost to be tracing a line across …
An echidna moving across an Australian forest floor can look almost methodical. Its head stays low as it noses through leaf litter, investigates rotting wood and presses its long, narrow …