Sand darter becomes the latest “underwater warbler” discovered in Metro Parks

ANDREW BOOSE
Aquatic Ecologist

Sand darter. Photo Mac Albin

As central Ohio streams warm just a little, a cacophony of color plays out under the rapids, riffles, runs and pools. The fish known as darters begin their annual ritual of mating. The male darter color begins to deepen in an attempt to catch the eye of a female. Mac Albin, our past Aquatic Ecologist, best described the darters as the “warblers of the underwater world.”

Orange throat darter. Photo Mac Albin

The blue-breast males show deep blue blacks, the orange throat of the head waters show brilliant oranges and vibrant yellows while the banded and greensides’ green could outshine an emerald. The tippecanoe, our state’s smallest fish, is clad in what looks like a brand-new copper penny outlined with orange.

Twenty years ago, darters were just coming back to our streams as water quality improved. Now there are 16 of them and… Oh! Wait a minute! This just in! Thanks to Brian Zimmerman, the Research Associate with Stream and River Ecology (STRIVE) Lab OSU, and their state-wide non-game fish reintroduction of fish extirpated from the area, we now have 17 darter species. The work of Brian and his team has successfully reared Iowa darters in a few of our ponds.

BUT WAIT! There’s still more! This just in! As this article was being written, another brand-new native fish for the Metro Parks has been discovered—the sand darter. So now we have 18 species of darters in Metro Parks. While not as spectacularly colored, this slender darter lives up to its name in the sand bars of larger creeks. The latest new species was found by Brian and his team in Big Walnut Creek on land acquired by Metro Parks in 2020. They were collecting darters to be relocated to the Stillwater River, where the variegate darter has been absent since the 1800s.

Variegate darters. Photo Mac Albin

The Resource Management Team gets to see all this color because of our studies of water quality in Metro Parks streams. We sample streams to track fish populations, of which the darters are among the species that react most to changes in water quality. We also use the services of outside researchers from various agencies to collect data on the rise or decline of fish species.

One thought on “Sand darter becomes the latest “underwater warbler” discovered in Metro Parks

  1. Thank you for your research and sharing! These photographs really important to motivate me to actually bring my binoculars and go wading or kayaking. Great job, staff /Battelle Darby Creek!

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