Thirty-two years ago, Penn biologist Daniel Janzen broke some ribs falling into a ravine in the Area de Conservacion Guanacaste in northwestern Costa Rica. Sore and unable to leave his chair beneath a 25-watt light bulb deep ...
Plants & Animals
Aug 5, 2010
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Chemical defenses of plants not only affect the growth and development of herbivores, but also, indirectly, the next consumers in the food chain. A new study shows that herbivores and their predators have evolved efficient ...
Plants & Animals
Dec 19, 2019
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(PhysOrg.com) -- Like children everywhere, kids in Hawaii love to run barefoot through tall grass. But an invasive pest called the nettle moth caterpillar can take the fun out of this simple childhood pleasure, according ...
Ecology
Nov 19, 2009
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An international research team including scientists from the Max Planck Institute for Chemical Ecology in Jena has discovered that the striking orange and black wings of monarch butterflies not only send the message to predators ...
Evolution
Jan 18, 2023
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About 160,000 species of butterflies and moths are already known, but scientists believe that a similar number still remain undiscovered. Identification and characterization of these species can be complicated by the fact ...
Plants & Animals
Nov 23, 2011
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(PhysOrg.com) -- In most animal species, males and females show obvious differences in body size. But how can this be, given that both sexes share the same genes governing their growth? University of Arizona entomologists ...
Plants & Animals
Mar 11, 2010
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Researchers have shown for the first time how Golden orb web spiders (Nephila antipodiana) add a chemical to their web silk to repel invading ants.
Plants & Animals
Nov 23, 2011
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It's one of life's special moments: a child finds a fat caterpillar, puts it in a jar with a twig and a few leaves, and awakens one day to find the caterpillar has disappeared and an elegant but apparently lifeless case now ...
Cell & Microbiology
Feb 29, 2012
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The larva of a Vietnamese moth has devised a unique form of transport—constructing a leaf cone and thrashing about inside to make it jump, a study showed Wednesday.
Plants & Animals
Aug 21, 2013
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Trichomes, hair-like projections on leaves, are part of a plant's defense against herbivores: they can be obstacles, traps, or reservoirs for toxic substances. The hairs of wild tobacco Nicotiana attenuata contain primarily ...
Plants & Animals
Apr 25, 2011
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