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December 03, 2016
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Survival adaptations in nature

This fledgling eagle, scanning the water, has not yet attained the skills required to snatch a fish out of the water, but some of these fledglings have been observed grabbing eels with their feet as they wade in the clear shallows of the Delaware River. Whether or not this behavioral adaptation is learned from the parents is not certain.

August 7, 2013

August is upon us, and nature’s clock is letting us know in the form of nightly katydid serenades and blooming cardinal flowers along streams and wetlands. If you have seen cardinal flowers in the wild, you may also have seen many hummingbirds and swallowtail butterflies near the brilliant red blooms of the cardinal flower. This striking trait of the cardinal flower is an adaptation of the plant to help attract pollinating fauna; the birds and insects, in turn, exhibit behavioral adaptation when they are attracted by brightly colored plant inflorescence when gathering nectar or pollen.

Many adaptations are visual. Camouflage, color, patterns and shapes are common in many animals, and some insects may mimic other species in order to discourage would-be predators. Eyespots on some species of butterflies are a good example of this. Some creatures can change their color on the fly; grey tree frogs, for instance, common in the region, can change their color to suit their surroundings.

Many adaptations in nature can be found without having to venture far, and some of them can be very surprising. The images in this week’s column show some common, and not so common, nature adaptations from our region.