The word "enrichment" gets thrown around a lot in animal keeping, and with most invertebrates it feels a bit generous. An isopod colony doesn't need enrichment. It needs leaf litter and calcium and to be left alone. But jumping spiders are different. They're visual, curious, active hunters with genuinely complex behaviour. They notice things. They investigate things. And in a bare enclosure, they get bored. Whether "bored" is the right word for what's happening in a salticid brain is debatable, but the behaviour difference between a spider in a stimulating setup and one in an empty cup is obvious.
What counts as enrichment?
Anything that gives the spider something to explore, investigate, or interact with beyond the basic necessities of food and shelter. This includes physical enclosure design, feeding variety, and things you do during handling. It doesn't include buying tiny hats from Etsy (though I won't pretend I haven't looked) or the various "jumping spider toys" you see marketed online, most of which are just small objects the spider ignores.
Enclosure complexity
The simplest form of enrichment is a well-furnished enclosure. Cork bark pieces at different angles, small branches, fake or live plants, and varied textures give the spider a landscape to explore. They'll map their enclosure over time, learning where things are and navigating accordingly. Change things around occasionally and you'll see them re-explore areas they'd previously stopped visiting.
Different heights and levels matter. Jumping spiders are arboreal and they use vertical space. A single flat platform isn't as interesting as multiple levels connected by branches that require climbing and jumping to navigate. Think about creating routes rather than just surfaces.
Live plants (small, non-toxic species like pothos or small ferns) add complexity and also help regulate humidity. The spider won't eat them, but it will build retreats on them, hunt on them, and use them as vantage points.
Feeding as enrichment
Hunting is a jumping spider's primary behaviour. In the wild, they stalk prey across complex three-dimensional environments using their exceptional vision. In captivity, most keepers drop a fly into a small box. It works nutritionally, but it's not very stimulating.
Ways to make feeding more interesting:
- Vary the prey type. Alternate between fruit flies, bottle flies, small crickets, and small mealworms. Different prey moves differently and requires different hunting strategies. A fly that can land on the ceiling presents a different challenge than a cricket on the floor.
- Release prey at different points in the enclosure. Don't always drop it in the same spot. Place a fly near the top, the bottom, on a plant leaf. Make the spider work for it.
- Occasional larger prey. A fly slightly bigger than what you'd normally offer (still within safe limits, never larger than the spider's abdomen) takes more effort to subdue and seems to engage the spider more actively. Don't overdo this.
Some keepers use tweezers or tongs to hold prey and move it around, triggering the spider's tracking instinct. This works well during handling sessions. The spider locks onto the moving prey item with its anterior median eyes, stalks it across your hand, and pounces. It's one of the more entertaining things you can do with a spider.
Visual stimulation
This is the bit that surprises people. Jumping spiders have the best vision of almost any invertebrate. Their anterior median eyes (the two large forward-facing eyes) have tube-shaped retinae that can resolve colour and detail at distances that seem unlikely for an animal this small. They process visual information in ways that go well beyond simple light detection.
What this means in practice: your spider can see you. It watches you. And it responds to visual stimuli outside its enclosure. Some things keepers have observed:
- Spiders tracking a finger moved slowly across the outside of the glass.
- Spiders reacting to videos played on a phone held up to the enclosure (particularly videos of moving insects or other spiders).
- Spiders watching television from across the room. Whether they understand what they're seeing is extremely doubtful, but they do orient towards the movement.
- Spiders responding differently to different coloured objects held near the enclosure.
There's been actual research on this. Studies have shown that jumping spiders can distinguish between different visual stimuli and will attend to biologically relevant images (like silhouettes of other spiders) more than random shapes. It goes beyond simple motion detection.
I'm not suggesting you set up a cinema for your spider. But placing the enclosure somewhere with a view of the room, where the spider can see activity and movement, is probably more stimulating than facing a blank wall. Keep the enclosure out of direct sunlight, though. Overheating kills faster than boredom.
Handling as enrichment
Regular, gentle handling sessions are a form of enrichment in themselves. Your hand is a warm, textured, moving surface with interesting topography. Spiders will explore your fingers, investigate your sleeve, peer at your face from your palm. The novelty of being outside the enclosure, with new visual information and new terrain, appears to engage them.
Keep sessions short (5-10 minutes) and don't handle if the spider is showing signs of stress. But for a settled, confident spider, time outside the enclosure seems to be something they actively choose when given the option. Many will walk out of an opened enclosure onto a waiting hand without any coaxing.
What doesn't work
Mirrors. People try mirrors, expecting the spider to display at its reflection. Some spiders do react to mirror images, but the responses are inconsistent and can include threat displays and stress behaviours. If you try it, keep it very brief and watch for signs of agitation (raised legs, rapid retreat). A stressed spider isn't an enriched spider.
Cohabitation. Two spiders in one enclosure is not enrichment. It's a recipe for one dead spider. Jumping spiders are solitary predators. They do not want company. The "enrichment" of a cage-mate is the enrichment of a meal, eventually.