If you’ve been startled by a large, spider-like cricket jumping toward you in your basement, you’ve likely met a greenhouse camel cricket. These Asian invaders have quietly taken over basements across the DMV area. They’re now the most common camel cricket species in many eastern US homes.
In my years as a licensed tech with our family business, I’ve seen a big jump in greenhouse camel cricket problems across Maryland, Virginia, and DC. What makes them so tough is that they’re not native to our area. They’re exotic pests that have found the perfect home in our damp basements.
What Are Greenhouse Camel Crickets?
The greenhouse camel cricket (Tachycines asynamorus) came from the moist forest caves of East Asia. They first showed up in Western records in 1902 in a palm house in St. Petersburg. They likely arrived through plant shipments.
Unlike our native camel crickets, greenhouse camel crickets have adapted well to indoor life. They can breed year-round in heated buildings. This gives them a huge edge over native species that need a winter rest. Studies show these invaders now dominate camel cricket numbers in eastern US homes.
Research from North Carolina State University found that greenhouse camel crickets now make up over 90% of all camel crickets in eastern US homes. The study used specimens collected through citizen science and found an overwhelming number of the Asian species indoors. This shift happened largely without notice across multiple Mid-Atlantic states, including Maryland, Virginia, and DC.
University of Maryland entomologist Mike Raupp confirms that the Asian species has become “the most common variety found in the DMV,” often startling homeowners who go into their basements.
How to Identify Greenhouse Camel Crickets
Spotting a greenhouse camel cricket is easy once you know what to look for. They have several features that set them apart from native species.
Physical Traits
Greenhouse camel crickets have bodies that measure 11-15 mm, but they look much larger because their legs and antennae are about four times their body length. Their coloring is mottled gray to yellow-brown with a dark band behind the head.
The hind legs show faint banding patterns. Like all camel crickets, they have no wings. Their humped back gives them the “camel” nickname, and their long legs make them great jumpers.
How They Differ from Native Species
Native basement camel crickets (Ceuthophilus species) have slightly larger bodies on average but shorter legs. The biggest difference is in their hind leg spines. Natives have a few large spurs. Greenhouse camel crickets have dozens of small spines.
Native species also rarely gather indoors in large numbers. Greenhouse camel crickets often show up in clusters of dozens, especially in damp spots.
| Greenhouse Species | Native Species | |
|---|---|---|
| Body Size | 11-15 mm body | Slightly larger body |
| Leg Length | 4x body length | Shorter legs |
| Hind Leg Spines | Dozens of small spines | Few large spurs |
| Clustering | Gathers in dozens | Rarely large groups |
| Indoor Breeding | Year-round | Needs winter rest |
Use this quick test if you’re not sure which type you have.
Why DMV Basements Are Perfect for Them
The climate and housing in the DMV area create ideal conditions for these invaders. Our humidity levels, combined with typical basement moisture issues, give them exactly what they need.
Two factors make DMV basements so inviting: high moisture and stable warmth year-round.
Greenhouse camel crickets need humidity above 70% to thrive. They seek out the dampest areas of homes: basements, crawl spaces, sump pump wells, and spots around HVAC condensate lines.
According to University of Maryland Extension, lots of camel crickets in a basement usually point to an unresolved moisture problem. These crickets act as living moisture meters. If you have a lot of them, your home is too damp.
Greenhouse camel crickets can breed nonstop in heated buildings. Native species go dormant in winter, but the greenhouse species keeps going all year when temps and humidity stay steady.
This means you might find eggs, nymphs, and adults all at the same time. It also explains why their numbers can grow so fast in the right conditions.
Behavior and Diet
Knowing how these crickets act helps explain why they’re so startling and why they stick around.
Night Activity
Greenhouse camel crickets come out at night and during low-light hours. During the day, they hide in wall voids, under stored items, and in dark corners. Most homeowners first see them when they flip on a basement light after dark.
Unlike house crickets, these crickets are completely silent. They have no wings to make chirping sounds, so you won’t know they’re there until you see one.
Jumping Toward You
These crickets can jump up to 3 feet in one leap. When startled, they don’t jump away. They jump toward you. This bluff is meant to scare off predators, but it just makes the encounter worse for homeowners.
What They Eat
Greenhouse camel crickets eat almost anything. Outdoors, they consume fungi, rotting plant debris, dead insects, and even other crickets. This varied diet helps them survive in basements where food is limited.
Indoors, they’ll nibble on paper, cardboard, cotton, linen, wool, and silk, especially items soiled by sweat or food spills. While they’re not as destructive as silverfish, they can cause minor damage to stored fabrics and documents.
Why Camel Crickets Point to Moisture Problems
In my work helping homeowners across the DMV, greenhouse camel cricket problems almost always point to moisture issues. These crickets serve as early warning signs for conditions that can lead to bigger problems.
Their numbers explode where vapor barriers are missing, gutters leak, or there’s no dehumidifier running. I’ve found that homes with large cricket numbers also have humidity levels that support mold growth and dust mite problems.
Just as termite mud tubes point to moisture issues that support wood-destroying insects, large cricket numbers signal the same underlying dampness that can damage your home over time.
How to Get Rid of Greenhouse Camel Crickets
Getting rid of these crickets takes a two-part approach: deal with the crickets you have now, and fix the moisture that brought them in.
The most effective long-term fix is getting humidity below 50%. Install dehumidifiers in basements and crawl spaces, especially during humid summer months. Fix leaky gutters, extend downspouts at least 6 feet from the house, and install vapor barriers in crawl spaces.
Seal gaps around utility pipes, worn door sweeps, foundation cracks, and crawl space vents. This stops new crickets from getting in while you deal with the ones already inside.
Place sticky traps in dark corners to catch crickets at night. These traps also help you track numbers and find the most active spots. Vacuum corners, baseboards, and around stored items regularly.
Here’s a checklist for tackling the moisture that drives most cricket problems.
- Dehumidifier: Keep basement humidity below 50%
- Crawl space fans: Install powered fans for better air flow
- Gutters and downspouts: Make sure water drains away from the foundation
- Vapor barriers: Lay 6-mil plastic in crawl spaces to block ground moisture
- HVAC drains: Clean condensate lines and insulate cold water pipes
Professional Treatment
When greenhouse camel cricket numbers get out of hand, professional help can speed things up while fixing the root cause.
Our approach starts with finding and fixing moisture sources before applying any treatments. Chemical treatments, when needed, target the areas where crickets enter rather than broad indoor sprays. Indoor sprays don’t work well because crickets avoid treated open floor areas.
We also set up ongoing monitoring to catch new problems early. Regular checks can spot moisture issues before they lead to major pest problems.
How They Spread So Far
The rise of greenhouse camel crickets in DMV homes is a big shift that happened largely without notice. Studies show these invaders now make up 92% of camel crickets found in North Carolina homes, with similar rates across the Mid-Atlantic.
They spread through moving boxes, potted plants, and firewood. Their ability to thrive in the steady warmth and humidity of buildings gives them an edge over native species that need natural seasonal cycles.
Their jumping and nighttime roaming helps them colonize new rooms and even spread between units in apartment buildings. This has made them very successful urban invaders.
When to Call a Professional
Minor cricket problems can often be fixed with moisture control and sealing. But larger numbers usually need professional help.
Call a pro when you’re seeing dozens of crickets on a regular basis, when your moisture control efforts aren’t working, or when crickets are showing up in multiple rooms. We can find moisture sources you might miss and put a full plan in place.
At Better Termite & Pest Control, we’ve served the DMV area for over 57 years with more than 1,000 five-star reviews. Call us at 703-683-2000 or email info@bettertermite.com for a free check.
Here’s what greenhouse camel crickets look like up close so you can compare them to what you’re seeing at home.
