The male nursery spider's habit of giving fake mating gifts

Imagine showing up to a high-stakes first date with a beautifully wrapped box that’s actually empty. That is the male nursery spider’s favorite scam.

To avoid being eaten by a hungry female, he usually brings a "nuptial gift"—a juicy fly wrapped in silk. But some of these guys are total cheapskates.

They’ll wrap up a worthless twig or a sucked-dry insect shell in layers of fancy silk. While she’s distracted unwrapping the "present," he gets straight to mating and bolts before she realizes she’s been ghosted with a piece of trash.

Wait, doesn't she eventually realize she's been scammed?

Oh, she definitely finds out, and the fallout is as messy as a reality TV reunion. If she realizes it’s a dud before he’s finished his business, she’ll cut the session short and kick him out—or worse, turn him into the actual dinner he failed to provide.

But here’s the kicker: the silk wrapping is so thick and complex that it takes her a while to get through the packaging. By the time she hits the worthless center, he’s usually already done his thing and sprinted away like a guy who forgot his wallet at a restaurant.

Is making all that silk really easier than just catching a bug?

It sounds like a lot of work, but in the spider world, calories are currency and hunting is a high-risk gamble. Catching a fresh fly takes energy he’d rather spend finding his next 'date.'

Silk is a biological budget hack. It’s relatively cheap to produce, meaning he’s trading a few cents of packaging for a high-stakes payout without having to go grocery shopping.

As long as the wrapping keeps her busy for those crucial minutes, the scam wins. If a counterfeit gets the job done, evolution sees no reason to pay full price.

Can't she just weigh the gift to see if it’s a scam?

That’s exactly what she’s doing! It’s a high-stakes evolutionary arms race where some females have started "hefting" the gift to check its weight before they commit to the date.

If the package feels suspiciously light—like a hollowed-out bug shell—she might just drop it and walk away. It’s like shaking a box to see if your "iPhone" is actually just a potato.

To counter this, males now add random debris or extra silk just to make the fake gift feel heavy and legit. It’s a never-ending cycle of biological catfishing.

Hold on, has this scam become the new normal for all of them?

Not quite, but it’s a popular "budget" lifestyle. In reality, it’s a mixed bag. You’ve got the honest hunters and the silk-wrapping scammers living side-by-side.

The "nice guys" who bring real food actually have a huge advantage: time. A female eating a real fly stays distracted much longer than one poking at a twig. That extra time allows the honest male to transfer way more sperm.

So, while the scammers save energy, the providers have more kids. It’s nature’s way of balancing the "cheap date" against the "high-roller" strategy.