Button'S Banana Slug
ExploreInvertebrate
Button'S Banana Slug
ariolimax buttoni
Button's Banana Slug (Ariolimax buttoni) is a fascinating and iconic terrestrial mollusk native to the moist, coastal forests of California. Known for their striking, banana-like appearance, these slow-moving invertebrates play a crucial role as nature's recyclers. As dedicated detritivores, they tirelessly comb the forest floor for decaying organic matter, fungi, and animal droppings, transforming waste into nutrient-rich soil that sustains giant redwood ecosystems. Watching a Button's Banana Slug glide gracefully across a mossy log is a testament to the quiet, hidden machinery of the forest. They are beloved symbols of the Pacific coast's damp, old-growth woodlands, capturing the curiosity of hikers and naturalists alike with their vibrant coloration and vital ecological contributions.
Habitat: Found in moist coastal redwood forests, often residing among damp leaf litter, ferns, and decaying logs.
Appearance
This large, fleshy slug is instantly recognizable by its vibrant, mustard-yellow to greenish-yellow coloration, which strongly resembles a ripe banana. Some individuals feature dark brown or black spots scattered across their bodies, making them look like overripe bananas. Measuring between 10 to 25 centimeters in length, they possess a prominent saddle-shaped mantle behind their head, which houses a single breathing hole called a pneumostome on the right side. Their head features two pairs of retractable tentacles: a longer upper pair tipped with eye spots for sensing light, and a shorter lower pair used for feeling and tasting their immediate environment.
KingdomAnimaliaPhylumMolluscaClassGastropodaOrderStylommatophoraFamilyAriolimacidaeGenusAriolimax
Category
InvertebrateRarity
Common
Danger
1/5 · Very low
Snaps
Be the first to snap!
Interesting facts
Banana slugs are the second-largest species of terrestrial slug in the world, surpassed only by the Limax cinereoniger of Europe.
Their slime is so unique that researchers have studied it to develop surgical glues and medical adhesives because of its powerful binding properties in wet environments.
They breathe through a single hole on the right side of their mantle called a pneumostome, which they can purposefully open and close to prevent moisture loss.
They have an incredible ability to consume mushrooms that are highly toxic to humans, acting as vital spore-spreaders for the forest's fungal network.
Special abilities
Ability
Anesthetic Slime Defense
When threatened, they secrete a specialized, thick mucus that contains a mild anesthetic to numb the mouths and tongues of potential predators.
Ability
Moisture-Regulating Mucus
Their slime not only helps them glide over rough terrain but also absorbs water from the environment, protecting them from fatal dehydration during dry spells.
Ability
Hermaphroditic Reproduction
They possess both male and female reproductive organs, allowing any two mature slugs to mate and lay viable eggs, which maximizes their reproductive success.
Measurements & details
- Length
- 10-25 cm
- Weight
- 0.05-0.11 kg
- Lifespan
- 1-7 years
- Clutch Size
- 20-30
- Incubation
- 21-60 days
Diet & Feeding
They are essential forest scavengers, feeding primarily on decaying plant matter, fungi, and animal droppings.
Age differences: Juveniles eat softer, more easily digestible fungi and tender shoots before transitioning to a broader, coarser detritus diet as adults.
Primary Foods
- Decaying leaves
- Mushrooms and fungi
- Animal feces
- Mosses
- Dead plant matter
Foraging Method
- Foraging
Ecological connections
eaten by
Pacific Giant Salamander
Dicamptodon tenebrosus
One of the few predators capable of eating adult banana slugs despite their sticky, numbing slime.
eaten by
Common Garter Snake
Thamnophis sirtalis
Garter snakes will sometimes prey on juvenile banana slugs that are smaller and easier to swallow.
consumer
Fly Agaric
Amanita muscaria
Banana slugs consume various fungi, including toxic species like the Fly Agaric, without ill effects, spreading their spores throughout the forest.
consumer
Redwood Sorrel
Oxalis oregana
The slug frequently forages among and feeds on the decaying leaves of this common forest floor plant.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
Collections for this object will appear here as more themes are added.
Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Button'S Banana Slug?
The easiest way to identify Button'S Banana Slug is to use the Snappit nature identifier app.
How long is Button'S Banana Slug?
10-25 cm
How much does Button'S Banana Slug weigh?
0.05-0.11 kg
How long does Button'S Banana Slug live?
1-7 years
What does Button'S Banana Slug eat?
They are essential forest scavengers, feeding primarily on decaying plant matter, fungi, and animal droppings.
Where is Button'S Banana Slug usually found?
Found in moist coastal redwood forests, often residing among damp leaf litter, ferns, and decaying logs.
How does Button'S Banana Slug hunt?
Foraging
How many eggs does Button'S Banana Slug lay?
20-30
Snap Map
Zoom in to split clusters and explore where this object has been snapped.
Loading map…
Recent Snaps
Recent snaps will appear here as new observations are added.
Where to spot
Park25 sightings12 species
California, US
Armstrong Redwoods State Natural Reserve
You might spot Redwood Sorrel, Redwood, and Button's Banana Slug.
View guide →
Park20 sightings12 species
California, US
Audubon Canyon
You might spot Hilton's Aeolid and Opalescent Nudibranch.
View guide →
Park21 sightings12 species
California, US
Mendocino Coast Botanical Gardens
You might spot Douglas's Ground Squirrel and Button's Banana Slug.
View guide →
Park14 sightings12 species
US
Mendocino and Headlands Historic District
You might spot Button's Banana Slug, Ochre Sea Star, and Bat Star.
View guide →
Park30 sightings12 species
California, US
Point Reyes National Seashore
You might spot Elk, Northern Elephant Seal, and Button's Banana Slug.
View guide →
Park30 sightings12 species
California, US
Regional Parks Botanic Garden
You might spot Pipevine Swallowtail and Western Fence Lizard.
View guide →
