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Vegetarian spider

19.05.2009

Zoologists have discovered a new species of spider in Mexico that feeds almost exclusively on acacia leaves and nectar.

It is not so easy for a spider to get food, because on this acacia, in the cavities inside its large spikes, ants also live, claiming the same resources. The Ants set things on a grand scale: each tree has its own colony and detachments are organized to guard the sources of nectar and young leaves rich in protein and fat.

Spiders have to bypass ant patrols to eat. Sometimes they attack ants carrying their larvae, take away and eat this burden, but basically they still prefer plant food.

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Insects became small, escaping from birds 15.06.2012

300 million years ago, when dinosaurs had not yet mastered the Earth, giant insects took over the sky. They were dragonfly-like predators with a wingspan of up to 70 cm. Then birds appeared. According to scientists from the University of California in an article published in the journal Proceedings of the National Academy of Sciences (PNAS), 150 million years ago they “captured” the sky, and large insects disappeared, giving way to smaller ones.

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