Photographs from a safari in Tanzania (the Serengeti, Ngorongoro, Tarangire and Lake Manyara), taken with a telephoto lens. Like much of experimental physics, wildlife photography is mostly a matter of patient observation.
Watching an elephant and her calf graze.
A male lion that walked straight towards us for a full minute.
Zebras in dry grass. Each animal's stripe pattern is unique.
A pride at rest: most are asleep, while the lionesses on the mound keep watch.
A giraffe's neck has seven vertebrae, as a human neck does; each is much longer.
A leopard resting along a branch.
Leopards haul their prey up into trees, out of reach of lions and hyenas. This one was keeping watch over its meal.
A spotted hyena, the reason leopards keep their prey in the trees.
A jackal glances back on its way through the grass.
A lilac-breasted roller.
Nile crocodiles on the bank. Gaping helps them shed heat; it is not a threat display.