Marsh Bird Surveys

The research staff has spent yet another Spring surveying marsh birds. Once a week for the past 6 weeks, staff arrive to work well before dawn and begin the survey approximately 30 minutes before official sunrise. The species of interest in this survey are Black Rail, Virginia Rail, King Rail, Clapper Rail, Least Bittern, Sora, and Common Moorhen. The data is ultimately used by the D.E.E.P., as we are just one place of many that perform this sort of survey. However, this data is also useful to us here at White Memorial because it tells us about the health of our wetlands. These birds are considered indicator species, ie, they indicate how much humans have disturbed that habitat. So, you can imagine our excitement when we find the birds we're looking for!

Interns Abby Wilson (Left) and Cheyenne Liberti (Right) during the
canoe portion of the survey on the Bantam River

The surveys start at first light (30 minutes before official dawn) and generally last about three to four hours. The survey consists of 16 points at which researchers drive or boat to. Once at the point, researchers play a CD provided by the D.E.E.P. The CD begins with 5 minutes of silence to allow the birds to settle after the initial disturbance of arriving on scene. Next, 7 different songs/calls are played for 30 seconds each, and separated by 30 seconds of silence. Whenever researchers hear a call or song of one of the birds of interest, we record the species heard, and at which point in the CD we heard it.

Pictured above is the CD player  a point on the survey which is accessed by truck.  

So far this season, researchers have heard Sora and Virginia Rail. As seen in a previous blog post, we were lucky enough to see a Virginia Rail calling to our canoe at the end of a recent survey. It called to us at the very last point on the survey, so once the CD was finished playing and the survey was over, we used an app to play Virginia Rail calls toward its direction. Within a few minutes we saw two, calling to us and back and forth to each other. The one pictured in the video in the previous blog post actually flew right into the gunwale of our canoe about 30 seconds after that video was taken. These birds are so mysterious. Not much is known about them, and they are presumed to be very secretive. In this encounter however, we witnessed some curious behavior by the birds.
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Here is a link to the blog post which highlights the Virginia Rail discussed above:Virginia Rail Call

Here is a D.E.E.P. special report from 1999 when state biologists first began these surveys :
Special Report Wetland Birds
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Photo of a Sora courtesy of Ian Davies -Macauley Library

Cornell Lab of Ornithology : SORA

Photo of a Virginia Rail courtesy of Evan Lipton - Macauley Library

Cornell Lab of Ornithology : Virginia Rail