Showing Up Early to Nature’s Party

Here cicadas, there cicadas, everywhere……

Cicada 3

Nature glories in being mysterious, but recently she has been downright confusing. Why cicadas now? These clumsy, noisy creatures are bumbling through the air looking for a mate but not having much success. Turns out that the raucous critters are four years too early.

Back in 2004, millions of periodic cicadas in Fairfax County created a din rivaling that of a lawn mower. These cicadas were to spend their 17 formative years underground as a larva quietly sipping sap from tree roots. Then, in a mysterious synchrony, they would emerge to shed their exoskeleton above ground. They would then leave a crispy, tan exuvae behind as they fly off in their adult form.

So why, suddenly, a 13-year cycle instead of 17? First, a little about these insects.

Weird looking, but not harmful

Cicadas cannot bite or chew, nor can they sting, so they pose no risk to curious kids. Cicada 2aThey can use their beak-like proboscis to pierce twigs to consume tree fluids. They are a scrumptious treat for most wildlife from birds to mammals to fish to fungus, and with only a short life as an adult, under two weeks, the periodic cicadas typically survive by overwhelming their predators with sheer numbers. As large and noisy as these insects are, they are easily found and munched. Those who do not get eaten get to mate.

As adults, that’s the main goal for cicadas — find a mate. Females quietly cruise while the males beat a come-hither call with their bodies. As a result, a lot of noise.

Cicada 1The lucky surviving females lay their eggs in thin twigs on trees and then die. The twigs eventually snap, resulting in dead leaves called flagging that hangs off tree tops. The tiny larvae sup on the fluids in the twig, grow, and soon fall to the ground. There they burrow underground to start their count to 17 (or 13 if that is their cycle). This elegant dance takes but a few weeks, and then the tree tops are quiet again.

Periodic cicadas baffle humans, even when they are expected. How can they count to 17? How do they all emerge at the same time? Why are they flying into my face? Why are they all over the road? Cicadas were pre-Ice Age residents, and our dominance of the landscape is a relatively recent phenomenon. As the ground cicadas dig into is paved over, the patient larvae emerge only to bump their heads and lose the chance to mate or be a meal to a grateful predator.

Do cicadas count?

The early emergence of the periodic cicadas is not a new phenomenon. Chris Simon, a professor of ecology and evolutionary biology at the University of Connecticut, surmised that the cicadas have four-year development cycles, which could explain why “stragglers,” cicadas that are four years too early or too late to the party, regularly occur. Others proffer that global warming could speed up the larvae development. Scientists estimate that this spring’s emerging population represented ten or less percent of the total population. If that’s accurate, just wait ’til 2021!

OLYMPUS DIGITAL CAMERACicadas may creep out humans with their size, noise and numbers, but they shout the primacy of nature. For a few short weeks, nature cannot and will not be ignored. That alone makes the mystery of the cicada inspiring. Perhaps that is why genus name is Magicicada.

For now, Fairfax County residents can marvel at the noisy, bumbling mystery. We may never know all the answers but can take joy in the wonder.

Author Suzanne Holland is the Assistant Manager at Hidden Oaks Nature Center in Annandale, Va. Photos provided by Park Authority staff and photographer Tuan Pham.

This entry was posted in Uncategorized on by .

About Fairfax County Park Authority

HISTORY: On December 6, 1950, the Fairfax County Board of Supervisors created the Fairfax County Park Authority. The Park Authority was authorized to make decisions concerning land acquisition, park development and operations in Fairfax County, Virginia. To date, 11 park bond referenda have been approved between 1959 and 2008. Another Park Bond Referendum will be held in November 2012. Today, the Park Authority has 420 parks on approximately 23,168 acres of land. We offer 371 miles of trails, our most popular amenity. FACILITIES: The Park System is the primary public mechanism in Fairfax County for the preservation of environmentally sensitive land and resources, areas of historic significance and the provision of recreational facilities and services including: o Nine indoor RECenters with swimming pools, fitness rooms, gyms and class spaces. Cub Run features an indoor water park and on-site naturalist. o Eight golf courses including Laurel Hill, our newest, upscale course and clubhouse located in Southern Fairfax County o Five nature and visitor centers. Also seven Off-Leash Dog Activity areas o Several lakes including Lake Fairfax, Lake Accotink and Burke Lake, with campgrounds at Burke Lake and Lake Fairfax o The Water Mine Family Swimmin’ Hole at Lake Fairfax, Our Special Harbor Sprayground at Lee as well as an indoor water park at Cub Run RECenter o Clemyjontri Park, a fully accessible playground in Great Falls featuring two acres of family friendly fun and a carousel o An ice skating rink at Mount Vernon RECenter and the Skate Park in Wakefield Park adjacent to Audrey Moore RECenter o Kidwell Farm, a working farm of the 1930s era at Frying Pan Farm Park in Herndon, now with historic carousel o Eight distinctive historic properties available for rent o A working grist mill at Colvin Run in Great Falls and a restored 18th century home at Sully Historic Site in Chantilly o A horticulture center at Green Spring Gardens in Annandale o Natural and cultural resources protected by the Natural Resource Management Plan and Cultural Resource Plans, plus an Invasive Management Area program that targets alien plants and utilizes volunteers in restoring native vegetation throughout our community o Picnic shelters, tennis courts, miniature golf courses, disc golf courses, off-leash dog parks, amphitheaters, a marina, kayaking/canoeing center o Provides 274 athletic fields, including 30 synthetic turf fields, and manages athletic field maintenance services at 500 school athletic fields PARK AUTHORITY BOARD: • A 12-member citizen board, appointed by the Fairfax County Board of Supervisors, sets policies and priorities for the Fairfax County Park Authority. %

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s