caterpillar on milkweed

The World of Insects

It’s common knowledge that monarch butterfly caterpillars eat only milkweed, but did you know that many other insects also feed exclusively on this host plant? Munched milkweed leaves could also be the work of (among other things) milkweed tussock moth caterpillars (Euchaetes), milkweed longhorn beetles (Tetraopes), milkweed weevils (Rhyssomatus), or swamp milkweed leaf beetles (Labidomera […]

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Ecological Interactions and the Bullfrog

Amphibians are key players in ecosystems on every continent except Antarctica. They contribute to both terrestrial and aquatic nutrient cycling and energy flows that hold ecosystems together. In particular, they are excellent and efficient converters of food energy into growth and reproduction and serve as both predators and prey. Tadpoles, for example, convert detritus (decaying […]

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Finding the North Star

The North Star Points True North Knowing how to find the North Star in the northern hemisphere is one of the most basic survival skills. Those of us in the north are fortunate to have the North Star as a handy survival tool for determining direction without a compass. Visible from the surface of the […]

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Bird Skeletons and Avian Physiology

Before the advent of airplanes, people mimicked the design of bird skeletons in hopes of achieving the freedom of flight. A great many flapping and gliding contraptions were conceived and tested, endeavors that yielded only a sense of disappointment and a few good lessons about flight dynamics. Others involved in similar experiments were far less […]

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