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But not all visitors have a fatal attraction to the pitchers. The red crab spider spends its entire life in the pitchers, hanging on with threads of silk. Instead of building a web, it relies on the water filled pitcher to trap its food. When an ant falls in, the spider simply waits for it to drown and then abseils down for a spot of fishing. Alive, this ant would be far too dangerous for the spider to tackle, so using the pitchers as traps, means it can get bigger meals. And the spider doesn' t rob the pitcher of everything. The digested remains of its booty will end up in the water providing instant food for the plant. Other food, like mosquito larvae, seems to be out of reach but the spider has another surprising trick. By taking its own air supply trapped in a bubble the crab spider can actually dive to the very bottom of the pitcher. Once the prey is captured, the spider hauls itself back up its silken safety line. |
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dàn bìng bú shì bèi xī yǐn dào zhū lóng cǎo zhōng de kūn chóng dōu huì sàng mìng. hóng huā zhū zhěng gè yī shēng dōu zài zhū lóng cǎo zhōng dù guò, tā lì yòng sī xiàn xuán guà zài lóng zi lǐ. hóng huā zhū bú shì kào jié wǎng bǔ zhuō kūn chóng, ér shì kào zhuāng le shuǐ de lóng zi huò qǔ shí wù. rú guǒ yì zhī mǎ yǐ diào rù lóng dǐ, zhī zhū děng zài nà li ràng mǎ yǐ yān sǐ rán hòu rào shéng jiàng xià bǎ tā lāo qǐ lái. rú guǒ zhè shì zhǐ huó mǎ yǐ, tā kě néng tài wēi xiǎn, zhī zhū wèi bì néng bǎ tā zhì fú, suǒ yǐ bǎ lóng zi dàng zuò xiàn jǐng zhè yì wèi zhe tā néng dé dào dà fèn de měi cān. zhī zhū bìng bú shì bǎ lóng zi lǐ de dōng xī quán bù jù wéi jǐ yǒu, tā chī shèng de bù fèn dōu liú zài lóng dǐ de shuǐ lǐ, chéng wéi zhū lóng cǎo de kuài cān. qí tā shí wù, lì rú wén zi yòu chóng jié jué, sì hū zhǐ néng lìng hóng huā zhū wàng yáng xīng tàn. qí shí bù rán, duì cǐ tā yě yǒu jīng rén de gāo zhāo. tā lì yòng qì pào nèi de kōng qì, qián rù lóng dǐ bǔ zhuō. yī dàn bǎ liè wù bǔ huò, hóng huā zhū lì yòng zhū sī bǎo xiǎn shéng bǎ zì jǐ zhuāi shàng lái. |