Nick Upton / Shadow hammock spider (Labulla thoracica) male, with distinctive large palps, on a web under the eaves of a a garden shed, near Wells, Somerset, UK, September.

Steve Downer / Zebra jumping spider (Salticus scenicus) grooming mandibles with maxillary palps on dandelion seed head, UK. May.

Steve Downer / Zebra jumping spider (Salticus scenicus) grooming mandibles with maxillary palps on dandelion seed head, UK.

Nick Upton / Wolf spider (Pardosa sp.) male courting larger female by waving his black palps as he approaches, Wiltshire, UK, May.

Alex Hyde / Wolf Spiders (Pardosa sp.), male RIGHT waving palps in courtship display. Peak District National Park, Derbyshire, UK. May.

Alex Hyde / Wolf Spiders (Pardosa sp.), male RIGHT waving palps in courtship display. Peak District National Park, Derbyshire, UK. May.

Alex Hyde / Wolf Spiders (Pardosa sp.) mating, with male on top of female reaching underneath her with his palps. Peak District National Park, Derbyshire, UK. May.

Alex Hyde / Wolf Spiders (Pardosa sp.) mating, with male on top of female reaching underneath her with his palps. Peak District National Park, Derbyshire, UK. May.

Alex Hyde / Four-spot Orb Weaver Spider male (Araneus quadratus) at edge of female's web, waiting for an opportunity ot mate. The male's pedipalps (commonly shortened to palps or palpi) that are used to transfer...

Michael Durham / Spider close up of face showing multiple eyes and palps, western Oregon

Steven David Miller / Badge Huntsman spider (Neosparassus) sitting on tree trunk, detail of eyes, palps, mouth parts, Undara Volcanic National Park, North Queensland, Australia

Stephen Dalton / Garden spider (Araneus diadematus) sequence of three images showing palps used for web control, UK