Amphibians
Rocket Frog
Litoria nasuta · also called rocket frog, striped rocket frog
A rocket frog is a frog built for one thing: getting away fast. Slim, sharp-nosed, and almost all hind leg, it can fire itself two metres in a single jump — about fifty times its own body length — and chain those leaps into a low, zig-zagging sprint across open ground.
Overview
The rocket frog, usually the striped rocket frog Litoria nasuta, is a small (4–5 cm) Australian frog of grassy wetland edges — swamps, ditches, flooded pasture, farm dams — across the north and east of the continent and into New Guinea. It hunts ants, beetles, flies, and spiders in the grass by day and dusk.
The jump
Its hind legs are far longer than its body, and a single leap of ~2 m puts it among the best jumpers of any frog relative to size — the equivalent of a person clearing several buses from a standing start. Flushed from cover, it does not make one jump but a fast erratic series of them, then freezes into its streaky camouflage.
A tree frog on the ground
Despite belonging to the Australian tree frog genus Litoria, the rocket frog is a ground-dweller with small toe pads that rarely climbs — a family member that traded climbing for sprinting. It breeds fast in temporary rain pools, its tadpoles racing to develop before the water dries.
Status
Least Concern — abundant, widespread, tolerant of farmland, and, unusually for an Australian frog, largely spared by the chytrid fungus, probably because it lives in warm lowlands where the fungus struggles.
Rocket Frog: common questions
How far can a rocket frog jump?
A striped rocket frog can leap around two metres in one bound, which is roughly fifty times its body length of about four to five centimetres. Scaled up, that is like a person jumping the length of three or four buses from a standing start. In tests of jump performance across many frog species, rocket frogs and their relatives come out near the top for distance relative to size. The frog can also chain leaps together with very little pause, so it does not just make one big jump but effectively sprints in a series of long, flat arcs.
Why is it called a rocket frog?
For the jumping and the shape. When disturbed, the frog takes off in a burst of long, fast, low leaps that look like it has been fired from somewhere, and its slim, sharp-nosed, streamlined body reinforces the impression of something built for speed. The name is used for several long-legged jumping frogs in the Australian genus Litoria, and separately for a group of small Central and South American frogs, which are not related but are also fast, leggy, and ground-living.
Is a rocket frog a tree frog?
It belongs to the tree frog family and the large Australian genus Litoria, which includes many true climbing tree frogs, but the rocket frog itself is a ground-dweller. It lives among grass and litter at the edges of wetlands, has only small toe pads, and rarely if ever climbs. It is a good example of how a family named for one lifestyle contains members that have moved into quite different ones, in this case trading climbing for sprinting and jumping across open ground.
Do rocket frogs make good pets?
They are kept by some Australian hobbyists under the appropriate licences, and they are hardy and interesting, but they are demanding in one specific way, in that they need a long, low enclosure with plenty of floor space, because a frog whose main behaviour is explosive jumping will injure its nose repeatedly launching into the walls of a small tank. They also need warmth, humidity, live insect food, and secure grassy cover. For most people they are better watched in the wild, where a torch at night by a grassy pond edge will often pick out several.