Guess What? Spiders Eat Their Greens Too!

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Jumping spider Cosmophasis micarioides (left) and golden-tailed spiny ants (right) compete for floral nectar in Queensland, Australia (photo credit: Andrea Lim, James Cook University).

When one thinks of a spider, the image that comes to mind is the crafty arthropod feasting on an innocent insect it has lured into its web. It turns out that the arachnids have a much more sophisticated palate. In addition to relishing the occasional fish and frog, they also have a strong penchant for vegetables. At least, that's the conclusion reached by a team of zoologists from the USA, United Kingdom and Switzerland, after an extensive worldwide study of the eight-legged arthropods.

Female jumping spider drinking sap from a Prunus leaf (photo credit: David Hill, Peckham Society, Simpsonville, South Carolina)

The researchers who observed spiders from ten different families say that they feed on a broad range of plant types including trees, shrubs, weeds, grasses, ferns and orchids. They also have a diverse taste in the kind of plant food, eating everything from nectar and plant sap to leaf tissue, pollen, and even seeds.

Though all the arachnids were seen eating some greens, it was the largest family of spiders — the Salticidae or jumping spider — that impressed the researchers the most. The plant-dwellers that accounted for 60% of all the vegetable eating incidents recorded by the scientists were experts at seeking out suitable plant food.

Pollen covered jumping spider Plexippus Kinshasa, Congo (photo credit: Nick Hobgood, University of South Pacific)

According to the study that was published earlier this year in the Journal of Arachnology, plant-eating spiders thrive in every continent except the Antarctica. Conversely, spiders living in warmer climates appeared to have a great liking for plant food. The scientists think it could be because tropical plants secrete more significant amounts of nectar, which not surprisingly, is popular with the spiders.

Adult female jumping spider Maevia inclemens drinking nectar at the extrafloral nectaries of a Prunus shrub.(photo credit: David E. Hill, Peckham Society, Simpsonville, South Carolina)

University of Basel's Martin Nyffeler, who led the study, believes that including vegetables in their diets does not only benefit the spiders nutritionally, but also increases their chances of survival during seasons when insects are scarce. However, much as they may enjoy their vegetables, there is little chance of the arachnids shunning insects altogether. That's because that the arthropods need the protein provided by their prey to fully develop and for activities like silk spinning.


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Reading Comprehension (3 questions)

  1. What food habits are spiders usually known for? What is the new discovery made by scientists recently?
  2. What different plants do spiders like? What different kinds of plant food do spiders like? What family of spiders enjoy vegetables the most?

Critical Thinking Challenge

How would the ecosystem be affected if spiders decided to stop eating...


Vocabulary in Context

“They also have a diverse taste in the kind of plant food, eating everything from nectar and plant sap to leaf tissue, pollen, and even seeds.”

In the above...

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  • lolFriday, November 3, 2017 at 6:27 am
    Try to put more COOLER picture there
    • lolFriday, November 3, 2017 at 6:26 am
      it is so cool
      • pintobeans
        pintobeansMonday, October 23, 2017 at 6:03 am
        Yes very cool indeed hehe
        • pintobeans
          pintobeansMonday, October 23, 2017 at 6:04 am
          I love spiders there my pets
        • AnotsocooldudeTuesday, October 3, 2017 at 7:06 pm
          I still don't like spiders
          • haha Wednesday, September 27, 2017 at 11:29 pm
            • nobodyFriday, May 26, 2017 at 9:39 am
              so cool i did not know
              • rock starFriday, May 26, 2017 at 9:37 am
                i like spiders bu never as much as now
                • chubby bunnyThursday, May 18, 2017 at 11:05 am
                  • hfkedhgkherkghkFriday, May 12, 2017 at 11:16 am
                    • punkboiTuesday, May 9, 2017 at 11:23 am
                      watch out the spiders are going to eat us

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