Some spiders craftily spin their webs in the upper part of pitcher plants so as to have first call on any inquisitive insects, and at least one kind of spider has a special skin that allows it to seek shelter in the plant’s digestive juices if it is threatened.
Mõned ämblikud aga koovad kanntaimede lehtede ülemisse ossa võrgendi, et lasta ise uudishimulikel putukatel hea maitsta, ning vähemalt ühel ämblikuliigil on eriline nahk, mida taime seedemahlad ei suuda lagundada.