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| Fiery skipper (Hylephila
phyleus). © Beatriz Moisset |
You probably thought I was running out of migratory
butterflies after my
last two posts. Not quite, there are more. But now I want
to turn to skippers and talk about two species that also deserve the name of
globetrotters.
Skippers are related to butterflies and often they are
called by that name. The clearest difference between the two is that the end of
a skipper's antennae ends in a hook, while that of a butterfly ends in a knob.
Most are not as colorful as butterflies, they skip along when flying, hence their name.
Butterflies, skippers and moths belong to the order
Lepidoptera, which literally means "scaly wings." You can tell them
apart from all other insects by this feature. Perhaps, in a future post I will
deal with migratory moths. Yes, there are some of those, too. In fact, a few perform amazing trekking feats.
As I mentioned, we know very little about the itineraries
and distances covered by migratory butterflies, other than monarchs. We know
even less about skippers. The only fact we are certain of about the ones I want
to discuss today –the fiery skipper and the long-tailed skipper– is that they
travel long distances, not just locally.
Fiery skipper (
Hylephila phyleus) is one of the so called grass skippers because its caterpillar
feeds on grasses. It has a bright orange color. It lives in temperate and
tropical areas and can be found from North America to Brazil and Argentina. Let me clarify that this
is its geographic distribution and it doesn't mean that it travels that far.
The ones that live in South America are
different populations. However, as I said before, it travels north in the
spring from the southern states to northern areas. It is thought that many of
those migrants don't make it back. Instead, they freeze and die when the
weather gets cold.
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| Long-tailed skipper (Urbanus
proteus). © Sean McCann. Bugguide |
The long-tailed skipper (
Urbanus proteus) is unusual in two respects, each hind wing has a long projection
that gives it its name, and its caterpillar feeds on members of the pea family.
This latter characteristic doesn't endear it to farmers. The caterpillar is
often called the bean leaf roller because it finds shelter by wrapping itself inside a leaf of this
plant. It is just as widespread as the fiery skipper. Once again, it is not
known if the ones that travel north or their progeny ever make it back to the
South.
Years ago, it was thought that some of the travelers
mentioned in previous articles failed to return south when the weather
deteriorated perishing at the end of the season. Later on, additional observations
showed that
painted ladies, red admirals and a few others, do indeed return south
in the fall.
I hope that, as we find out
more about these two species, we learn that they too are capable of escaping the
winter weather by migrating south in the fall.
Globetrotting Butterflies
More Globetrotting Butterflies
