Male redback spiders invite cannibalism through a ‘self-sacrificial somersault’ during sex – but why?
Of the 31 species of widow spider, male sacrificial behaviour is only usually observed in redbacks and brown widows. Photograph: cbstockfoto/AlamyView image in fullscreenA female redback. He also somersaults into the jaws of the female.“He’s pumping sperm, he flips his abdomen right over into her mouthparts and then he constricts his abdomen … to make it hard for the female to get a purchase on his abdomen.
- ▪Of the 31 species of widow spider, male sacrificial behaviour is only usually observed in redbacks and brown widows.
- ▪Photograph: cbstockfoto/AlamyView image in fullscreenA female redback.
- ▪He also somersaults into the jaws of the female.“He’s pumping sperm, he flips his abdomen right over into her mouthparts and then he constricts his abdomen … to make it hard for the female to get a purchase on his abdomen.
The Guardian — World publishes from United Kingdom and files mainly under world. We currently carry 2,996 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
inspect →
Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | The Guardian — World |
| Canonical URL | https://www.theguardian.com/environment/2026/aug/12/male-redback-spiders-invite-cannibalism-through-a-self-sacrificial-somersault-during-sex-but-why |
| Publication time | Tue, 11 Aug 2026 23:01:12 GMT |
| Retrieval time | 2026-08-11T23:10:43.236Z |
| Last seen | 2026-08-11T23:10:43.236Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | 0iMSPaX5_sTg · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
A female redback. Of the 31 species of widow spider, male sacrificial behaviour is only usually observed in redbacks and brown widows. Photograph: cbstockfoto/AlamyView image in fullscreenA female redback. Of the 31 species of widow spider, male sacrificial behaviour is only usually observed in redbacks and brown widows. Photograph: cbstockfoto/AlamySpidersMale redback spiders invite cannibalism through a ‘self-sacrificial somersault’ during sex – but why?New research sheds light on the genetic basis of the venomous insect’s ‘weird mating behaviour’ Follow our Australia news live blog for latest updates Get our breaking news email, free app or daily news podcast Donna LuTue 11 Aug 2026 19.01 EDTLast modified on Tue 11 Aug 2026 19.02 EDTSharePrefer the Guardian on GoogleIf you think you’ve…
Excerpt limited to ~120 words for fair-use compliance. The full article is at The Guardian — World.
Discussion
0 commentsMore from The Guardian — World
