Archive for Natural History

#100 Learning to see the flowers through the trees

August 28, 2008

 
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Photo courtesy of Rose Brown

Learning to identify the native flora and fauna has had a rich tradition rooted in our American history. The study of natural history starts can be accomplished one flower at a time.

Photo of cranefly orchid, Tipularia discolor, courtesy of Rose Brown.

This show originally aired in August 28, 2008 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net

When Teddy Roosevelt, known to be both big game hunter and amateur botanical collector, was asked to give an account of his interest and experience as an amateur naturalist, he replied, “The former has always been very real; and the latter, unfortunately, very limited.” I imagine most of us amateur naturalists feel pretty much the same way: it’s nigh impossible to imagine knowing very many organisms to the species level with the latest count around 2 million named and millions more suspected.

So we amateurs fall somewhere on the spectrum between curious and crazed, seeking to manage the acquisition of knowledge in ways that personally give pleasure. Birders pursue life lists

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#93 Gannetts

July 3, 2008

This show originally aired in April 25, 2007 and then again on July 3, 2008 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net

 
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On a sunny Sunday in April, we finally cast the lines off the boat and leave for a trial run to the Potomac after a long marina-bound winter. With a sweet 12 knot breeze out of the east, we are soon under sail skipping across the Potomac from Virginia to Maryland. The river is mostly empty of boats, a few April adventurers and other folks who know that this can be one of the best times on the Chesapeake and her rivers. And we have other company, too.
In the distance, the dive and plunge of birds, repeated again and again, catches my attention. Instinct suggests, and my binoculars confirm, that I am seeing Northern Gannets flocking and fishing. I know these birds from my time working on the ocean,

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#83 Shadbush, Serviceberry, and Sarvis

April 10, 2008
The serviceberry tree goes by many names, depending upon where you live or, sometimes, the species or cultivar.  Learning the stories behind  this early blooming shrub brings an appreciation for the richness of both cultural and natural history.

 
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This show originally aired on April 10, 2008 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net.
Photo of shadbush by Dudley Rochester.

This is one of those weeks that you can literally watch the hourly changes as spring bursts forth. It’s hard to know where to put your attention, amidst all the flowering trees – the dogwoods blooming on cue for the Festival, the audacious magenta flowering crabapple, redbud blossoms lining dark branches in perfect counterpoint, like tiny purple Christmas lights.

In this area, if spring seems to be moving too fast, you can always travel to a higher elevation and catch it again. If I were headed to the hills, the one tree I’d still be looking for is the serviceberry, whose white showy flowers have always been a reliable marker of spring, but pass so quickly that you may have only a few days before the wind snatches them from the bud and soft green leaves unfurl in their place.

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#81 See that Yellow Color in the Hills?

March 27, 2008
About the time that forsythia brazenly declares the sure coming of spring, the diminutive but no less reliable yellow flowers of the native spicebush light up the hills.

 
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This show originally aired on March 27, 2008 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net.

About the same time that forsythia brazenly claims the color award in yards all over the watershed, there’s a quieter, but no less remarkable, yellow emerging in the hills and woodlands, especially in the damper, cooler swales. You could almost miss it if you were expecting something more dramatic, but it’s worth stopping and taking a closer look at the shy but ubiquitous spicebush, also known as Benjamin Bush.

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#79 Rocking Around Charlottesville

On a field trip with the training group for the Rivanna Master Naturalists, students learn see 1.2 billion years of history in five stops around Charlottesville, just looking at rocks.
This show originally aired on March 6, 2008 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net.

 
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March 6, 2008

It’s a whirlwind geologic tour of the Virginia, and it all takes place within five square miles in Charlottesville. We’re a group of Rivanna Master Naturalists, standing before a rock outcrop that borders the rough boat launch into Ivy Creek just upstream of the Woodlands Road bridge. Tom Biggs, Professor of Geology at UVA, invites us to use the rock hammers he’s brought along, stepping forward himself to take a swing. A chunk of rock cleaves off, dropping into his practiced hand.

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