This spider turns its web into a spring-loaded catapult
Hyptiotes cavatus launches its triangular web at prey, and a 2025 silk-gene study adds a new chapter to the remarkable mechanism.
Latest from Introvertebrates
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New videos, research, and Sunday animal stories live here alongside collection and website notes that give visitors something genuinely new to explore.
Friday spider science
Recent research
Plain-language reporting built from primary papers and institutional sources, with limitations kept visible.
Cellar spiders may solve prey-capture problems with insight
Cellar spiders used three different ways to manage several flies at once, a pattern that tentatively points to flexible problem-solving rather than a fixed routine.
Invasive brown widow egg sacs largely escape parasitoid wasps
A 2026 field study in Israel found just one parasitized brown-widow egg sac among 1,895, far fewer than in three native widow species.
Colour vision helps jumping spiders choose better prey and lay eggs sooner
A 2026 experiment with Habronattus pyrrithrix links reliable red warning cues to more successful foraging and earlier egg laying.
Wolf spiders adopt another female's egg sac after losing their own
Experiments reveal indiscriminate egg-sac adoption and physiological stress responses following offspring loss in Pardosa lugubris.
Tarantulas actively use urticating hairs against ants
Experiments document the first active use of urticating setae by tarantulas against invertebrate attackers.
Why do male scorpions sting females during courtship?
A review examines whether scorpion sexual stings function through coercion, stimulation, signalling, or different mechanisms in different lineages.
Tiny spiders build giant spider-shaped decoys
Two Cyclosa orb weavers arrange silk, debris, and prey remains into structures resembling spiders much larger than themselves.
Every Sunday · På norsk
Kryp & Krabater · Ukas dyr
Short Norwegian animal stories for curious children, illustrated with original Introvertebrates photographs.
Ravnens hale peker ut arten
Lær å se etter ravnens store kropp, kraftige nebb og kileformede hale når den flyr.
Moskusen har to lag med pels
Oppdag hvordan lange dekkhår og svært fin underull beskytter moskusen i vind og kulde.
Oteren kjenner bevegelse i vannet
Se hvordan oterens kropp, hale, poter og værhår hjelper den med å svømme og jakte.
Knelerens forbein er et fangstverktøy
Se hvordan knelerens foldede forbein kan åpnes raskt når et byttedyr kommer nær.
Sonja bærer skjelettet utenpå
Bli kjent med Sonjas ryggskjold, bukskjold og de tre tydelige ryggene som kjennetegner Mauremys reevesii.
Ruby på nært hold
Se etter blå bein, oransje hår og små detaljer i nærbildet av Ruby.
Spettmeisen klatrer med hodet først
Se hvordan spettmeisens sterke føtter, lange klør og spisse nebb hjelper den med å lete etter mat langs trestammer.
Hvem gjemmer seg under barken?
Møt kakerlakker som skogsdyr, og se hvordan antennene og den flate kroppen hjelper dem med å utforske livet rundt død ved.
Videos, collection and website
Meaningful additions
New videos, profiles, substantial expansions, original media, and public features—not a log of invisible technical fixes.
Back after six months — a new animal room, new builds, and what comes next.
The comeback update follows a paludarium build while catching up on the move, the new animal room, enclosure work, Siuzi, the Codex, the website, and what comes next.
Every current resident has room for a fuller story.
The collection profiles bring verified species information, keeper observations, original photography, video, and public-safe Codex records together around each animal.