A Harris's antelope squirrel amongst the spines of the cholla cactus, where it painstakingly searches for cactus fruit - one of the only sources of moisture around. Whilst filming the amazing ...

Even its bee-friendly flowers are highly variable ... free of the shrub with movement. This way, the cactus ensures its spread. Jumping cholla doesn't require any irrigation after establishment.

The Cholla Cactus Garden, located about 12 miles south of the park's North Entrance, is home to one of the few stands of cholla cactus in the park. The short, quarter-mile Cholla Cactus Garden ...

Assistant producer Lance Featherstone removes the spines of the Cholla cactus from a glove, after David plunged it into the cactus to demonstrate its vicious defences. Team doctor Patrick Avery ...