#jumping spiders

The ones being sold are WILD CAUGHT. They're being found MISLABELED for sex (females labeled as males etc), and no consideration is being given to the fact that wild caught jumping spider females are pretty much ALWAYS GRAVID. They mate once and will lay around 5 clutches of 25+ eggs each clutch. Since they're only native to a few states, releasing spiderlings means potentially introducing invasive animals, meaning the choice comes down to raising a hundred or more babies or euthanizing a hundred or more babies.

This species (Uroballus carlei) is sometimes referred to as a caterpillar jumping spider or caterpillar jumper, because it bears such a striking resemblance to a caterpillar. It was discovered in Hong Kong just a few years ago.

Researchers believe that these strange little spiders mimic the caterpillars of local lichen moths, which may help to deter predators. Lichen moth caterpillars ingest toxic substances that make them unpalatable to predators, and they're covered in urticating hairs that cause pain and irritation when touched, so predators tend to avoid them. They also have aposematic features that advertise those defense mechanisms, making them an excellent model for mimicry.

The spider's resemblance to a caterpillar may serve as a defense mechanism against larger vertebrates, such as birds, and as a predatory ploy against certain invertebrates, like small beetles, thus allowing the spider to avoid being eaten while also enabling it to stalk and capture its own prey more effectively.

This article described the discovery back in 2019:

A new spider has been discovered, hiding in plain sight in one of the most populated places on the planet. And there’s a good chance it went undiscovered for so long because it doesn’t really look like a spider at all, but more like a fuzzy baby caterpillar. Its cute, fuzzy appearance has led the newly discovered spider to be named Uroballus carlei, after Eric Carle – author of the wildly popular children’s book The Very Hungry Caterpillar.

Living alongside Uroballus carlei in the wooded areas of the Eastern District in Hong Kong are lichen moths. During the caterpillar stage, these moths are covered in bristly brown fur not dissimilar to Uroballus carlei. They live on a diet of lichen, and it’s this diet that gives them their name.

Sources & More Info:

Journal of Entomology: A New Species of Uroballus from Hong Kong: a Jumping Spider that Appears to Mimic Lichen Moth Caterpillars (PDF)

University of Manchester: Newly Discovered Jumping Spider is Master of Disguise

University of Manchester: Newly Discovered Jumping Spider Named for Children's Author

Most jumping spider content I see is focused around Phidippus, which is a shame because Salticidae (the family of jumping spiders) is one of the most diverse families of spiders. This is just going to be some photos of different species or genera of Salticidae I find interesting.

Holoplatys lhotskyi

Photo Credit: Martin Stevens link

Megaloastia mainae

Photo Credit: remi_bigonneau link

Neobrettus sp

Photo Credit: link

Neobrettus tibialis

Photo Credit: wildsumatra link

Synagelides longus

Photo Credit: Arthur Tomaszek (talibzuo) link

Coccorchestes ferreus

Photo Credit: Piotr Naskrecki link

Uroballus carlei

Photo Credit: that_bee_guy link

Portia schultzi

Photo Credit: wynand_uys link

Synemosyna petrunkevitchi

Photo Credit: aperturesciencebylyn link (Tumblr link)

Rhene flavicomans

Photo Credit: poonpoon link

as a spider admirer, i'm also the world's #1 defeatist when one i want to photograph wanders off into leaf litter or a dense bush, especially if it's a jumper. so i was pretty surprised when i grabbed the plant this baby Heliophanus was on and instead of pulling the aforementioned technique it just climbed onto my finger and gazed thoughtfully into the distance instead

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Did you know that the Heavy-Bodied Jumper (Hyllus semicupreus) is a jumping spider found in India, Pakistan, and Sri Lanka? Like other spiders, the female is notably larger than the males. These diurnal hunters sometimes share a web sac. It'll be empty during the day and the male will come home during the night. Sometimes the female will come back as well that same night and they share the space. They'll hunt and eat any other small insect, but that's small compared to us and sometimes many times the size of the spider itself.

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