This post evaluates the claim on the label, “mosquitoes will gather near them”. Per the company, it is the first step in how the device kills mosquitoes. I.e., the device needs to attract mosquitoes if it is going to work.
Evaluating the claim
I used a security camera to record activity around the cap area. Here’s a photograph of how I arranged everything:
Below is a 15-second time-lapse to show that small insects such as ants were easily visible, even at night. I think they are Prenolepis imparis, which are 3-4 mm long —mosquitoes are larger and thus would be detectable even in flight.
On the day that began filming (September 2nd, 2020) I counted over a dozen mosquitoes (all Aedes albopictus) landing on my arms and legs within 30 seconds. According to the instruction sheet, the device begins to work instantly, as soon as water is added, so an hour of remote, video observation should be a sufficient amount of time to evaluate the attraction claim.
I collected continuous footage for over a week, ending observations on September 10th. The mosquitoes were still plentiful on that day.
During 183 hours of footage, I couldn’t find a single mosquito on or near the device. Here are the contents. I also posted a photograph to iNaturalist.
I don’t understand how the device can kill mosquitoes.
In related news, I’m aware of three of other people who have used security cameras to assess whether mosquitoes gather around Spartan Mosquito Eradicators. None found mosquitoes.
In case anyone might be skeptical of my results, I decided to upload all 183 hours of footage onto YouTube. I had to break it into 16 segments due to size limits on YouTube.