Ever thought about slugs? What about jumping slugs?

Probably not.

But they鈥檙e a thing 鈥� and they鈥檙e threatened, as by , the NPR affiliate based in Seattle.

Like the threatened spotted owl, slugs are important indicators of the health of Vancouver Island鈥檚 rainforest.

鈥淭hey are important to forests,鈥� said Jennifer Huron, provincial invertebrate conservation specialist with the B.C. Environment Ministry. 鈥淟ike all biodiversity in the forests, they deserve protection and attention.鈥�

The decline of two slug species on the south Island worries scientists: the dromedary and warty jumping-slugs. The species are both listed as threatened by the federal government.

The warty jumping-slug glides through the forests of the Sooke region. In contrast, the dromedary jumping-slug slimily slides through the undergrowth of the ancient forests of Port Renfrew along the coast to Pacific Rim National Park near Tofino.

And in case you were wondering: they do jump by flopping around on the forest floor 鈥� a defence mechanism, of sorts.

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Jumping-slugs primarily inhabit mature and older temperate rainforests. They require coarse woody debris and continually moist microhabitat to lay their eggs and take cover to minimize dehydration stress.

Slugs and snails play an essential part in the ecosystem by feeding on decaying and live vegetable matter like mushrooms, constantly turning over nutrients and keeping healthy the soil and plants that grow there.

鈥淭he fungi the slugs like are in the humus layer, so something has to come up and dig them up and disperse the spores, because they鈥檙e covered up,鈥� said biologist Kristiina Ovaska. 鈥淚t鈥檚 a fascinating interaction between the fungi, the trees and the little animals, such as slugs.鈥�

鈥淲e don鈥檛 fully understand what each part of the ecosystem does or what these species do. The unique bits of DNA has been evolving for a long time. We really need to protect all parts to understand what they鈥檙e about fully.鈥�

Dromedary and warty jumping-slugs are difficult to find, as they鈥檙e small and nocturnal and often hidden in leaves and fallen logs. Warty slugs are less than two centimetres in length, while the dromedary slug ranges in size from five to six centimetres.

鈥淵ou really have to look for them, especially with a species that鈥檚 rare and patchily distributed. You need to know where to look and go out at night when it is raining,鈥� Ovaska said.

A provincial mapping project is attempting to identify where the slugs live, with a view to accessing their habitat.

It鈥檚 not as simple as it sounds.

The slugs can only be found in the wet months of the year 鈥� March to May and September to October 鈥� and scientists need to be there while it鈥檚 raining heavily.

Huron said the plan over the next two years is to collect research material and create maps; they hope to leverage more money to protect the species. The maps will help to local government, industry and other property owners make informed decisions on the risk to the species.

鈥淢y job is to provide the science, and then others make those policy and socio-economic decisions,鈥� Huron said.

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