Hares are active primarily at night. With their long ears flattened against their back, they are difficult to see. Frequently on hot summer days, they can be seen resting in the shade of a small bush or even a fence post. When frightened they run with such speed that few dogs can catch them. At the start of the chase their speed is broken by high long leaps.
Hares are strict vegetarians, eating a great variety of herbs and shrubs.
In farming areas the Black-tailed Jack may become a serious pest in young orchards and to other agricultural crops. The flesh is excellent eating. While this is of minor consequence to humans, care should be used in handling or skinning all animals, as some diseases are transmissible through open cuts or abrasions. Cooking thoroughly eliminates any danger.