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It’s In Your Nature: Moths have amazing sense of smell

Moths and butterflies are in the Order Lepidoptera and just part of the world’s million plus species of insects.

In North America, over 91,000 insect species have been identified. Many, I’m sure, still need to be cataloged.

Of those 91,000, moths and butterfly species are the second largest order. Lepidoptera, in simpler terms, means scale wings. If you ever handled a butterfly or moth, and however carefully you did that, you probably had many of those scales stuck to your fingers or hands. The legs, bodies and wings are all covered with these scales.

There are a number of major differences between moths and butterflies.

Moths for the most part are nocturnal. (If you are a camper, think of those that flew into your nighttime campfire.) Moths’ bodies (abdomens) are usually rather thick in comparison to the thin (skinny) one of butterflies.

Butterflies are usually much more vividly colored, while the moths are usually duller or drabber. Moths are noted for their great sense of smell.

Moths have feathery antennae, while a butterfly’s antennae are thin, with a small club-like distal end. Moths rely on that sense of smell to locate flowers so they can get to the nectar.

Night blooming flowers don’t have to be “showy,” and in fact, are usually white and tubular. These flowers advertise with their fragrance. Daytime blooming flowers are brightly colored to attract bees, and of course butterflies, so that they can be pollinated.

It is truly amazing how organisms interact.

For example, how different plants depend on a certain insect or insects that are active at the time they need to be pollinated. That’s another reason you need to protect as many species as possible because they all fill a special niche (role) in nature.

Back to the moth’s amazing sense of smell. The feathery antennae of a moth have thousands of receptors along the sections of the antennae. Moths use this sense, of course, to find the nectar they need. But male moths use these super sensitive antennae to locate mates. The male gypsy moth can detect a female’s pheromones from about 1.5 miles away. Male moths fly a zigzag pattern to home in on her scent.

Adding some trivia here. To be politically correct, the name gypsy moth has now been changed to spongy moth.

Moths and butterflies use complete metamorphosis. This involves four stages: the egg, larva, pupa and adult.

Larva of moths and butterflies are caterpillars. The pupal stages of moths differ from butterflies. A caterpillar of a moth usually produces a fuzzy covering over it and it is referred to as a cocoon. A caterpillar of a butterfly, like a monarch, pupates in a thinner, non-fuzzy covering called a chrysalis.

Overall, moths and butterflies are both very beneficial, but sometimes devastating. Caterpillars provide a tremendous food source to so many species of birds. At the same time, you’re not happy when cabbage butterfly caterpillars eat your cabbage or broccoli. On a larger scale, spongy moth caterpillars can destroy huge sections of forests.

Look for some of our bigger moths over the next month or so. You may want to check out your porch light area at night or at dawn to see what species it may have detected. Nature viewing without getting out there. Enjoy.

Nature hint: When you read this column, about 95% of our bird species have returned. Get out there before all the leaves form to get some nice looks at them.

Test Your Outdoor Knowledge: True/False: There are about 10 times as many moth species as butterfly species in North America.

Last Week’s Trivia Answer: The great crested flycatcher often places a shed snake skin in its cavity nesting hole.

Email Barry Reed at breed71@gmail.com

ABOVE: The cecropia moth, North America’s largest moth, can be found in our region. But remember: The adult stage of insect metamorphosis is usually the shortest. This large “silk moth” does not eat, and its sole purpose is to reproduce.
LEFT: One of the distinguishing characteristics of moths is their large feathery antennae. The moths rely heavily on the sense of smell to find food, or for many, to find a mate.
It is no wonder the gypsy (spongy) moth can be so devastating to forests. Dozens of female gypsy moths are laying eggs on this red oak trunk. Each fuzzy egg mass contains hundreds of eggs.
As in most insects, sexual dimorphism is obvious. The female gypsy (spongy) moth is so laden with eggs that the male (darker moth) needs to fly to them in order to mate. BARRY REED/SPECIAL TO THE TIMES NEWS
The polyphemus moth is hard to find, mostly because they live just a short time. Like the cecropia, it has no feeding mouthparts and uses its limited time to find a mate.
Look for luna moths from mid-May through mid-June. These beauties have about a 4½-inch wingspan.
Butterflies are usually more colorful than the thousands of moth species, and they have thin antennae, usually with a club-like terminal end. They do not depend on their sense of small to locate their food.