Meet the Green Jumping Spider: Australia’s Arboreal Acrobat

If you’ve ever wandered through a lush garden in Queensland or northern New South Wales, you might have crossed paths with a dazzling little acrobat—the Green Jumping Spider, also known as the Northern Green Jumping Spider (Mopsus mormon). This species isn’t just another pretty face in the foliage; it’s the largest jumping spider in Australia and the only member of its genus, making it a true original.

What Makes Them So Special?

One of the coolest things about Mopsus mormon is their dramatic “sexual dimorphism” that’s a fancy way of saying males and females look quite different. Males sport a “baboon-like” or “monkey-faced” look, with a dark face framed by long white whiskers and a stylish black “mohawk.” Their bodies are a vibrant green with a dark red head, making them stand out among the leaves. Females, on the other hand, skip the whiskers and mohawk but show off a colorful red and white “mask” over a green face. Size-wise, females can reach up to 18mm, while males are a bit smaller at around 12mm, still hefty for a jumping spider.

Where Do They Live?

These spiders are right at home in the warm, moist regions of New Guinea and Eastern Australia. You’ll find them in trees, shrubs, and gardens, and they’re not shy about urban life. Brisbane locals might spot them blending in with green foliage in city gardens. Their natural camouflage is impressive, making them both elusive and fascinating to observe.

Life as a Green Jumping Spider

Green Jumping Spiders are diurnal hunters, meaning they’re active during the day. With their exceptional eyesight they stalk and leap onto prey, no sticky webs required! Instead, they use a silk “safety line” when jumping, just in case. Their menu includes flies, moths, and even other spiders. Males put on elaborate courtship displays, and both sexes build silken nests for resting and egg-laying, sometimes with separate “rooms” for males, females, and egg sacs.

Are They Good Pets?

Absolutely! These spiders are generally inquisitive and non-aggressive, though they can be defensive if handled. Their bites aren’t dangerous but can be painful, so gentle observation is best. If you’re looking for a pet that’s both beautiful and full of personality, Mopsus mormon.docx is a great choice.

How to Care for a Green Jumping Spider

If you’re thinking of keeping one of these emerald jumpers, here’s how to make them feel at home:

Enclosure Essentials

• Go Vertical: Choose a tall enclosure at least 12x12x20cm for adults. Height is more important than width, as these spiders love to climb.
• Material: Clear acrylic or glass is best for visibility.
• Doors: Use a front or side-opening door. Avoid top-opening lids, since these spiders build their silken hammocks at the highest point, and opening from above can damage their home.
• Ventilation: Make sure there’s plenty of cross-ventilation (holes on opposite sides) to keep air fresh and prevent mould.

Environmental Conditions

• Temperature: Keep things warm, between 24°C and 29°C (75°F–85°F). Room temperature is usually fine, but they prefer it on the warmer side.
• Humidity: Aim for 60%–80%. Lightly mist one side of the enclosure every few days so your spider can sip droplets.
• Lighting: Place the enclosure in a bright spot with indirect sunlight or use an LED light. Good lighting helps them hunt and stay active.

Interior Design

• Substrate: Use moisture-retaining materials like coco peat or a bioactive soil mix to help maintain humidity.
• Climbing Structures: Add vertical elements like cork bark, twigs, and live or silk plants (Pothos is a favourite).
• Hides: Provide small hides or “caves” near the top for your spider to retreat or moult in peace.

Final Thoughts

The Green Jumping Spider is a showstopper, vivid, curious, and surprisingly easy to care for with the right setup. Whether you’re a seasoned arachnid enthusiast or just spider-curious, Mopsus mormon is sure to bring a little wild wonder into your world.