TN Conservationist Magazine--Helping Cavity Nesters

The March/April issue of the Tennessee Conservationist magazine is in the hands of most subscribers now and includes my article on Helping Cavity Nesters--A Nestbox Trail for Eastern Bluebirds and Tree Swallows.

The article is the result of time spent with Billie Cantwell, Vice-president of the Knoxville Chapter of the Tennessee Ornithological Society (KTOS), as she monitored the nestbox trail at Seven Islands Wildlife Refuge in Knoxville, TN.  She is part of a team that includes husband Colin Leonard, refuge manager and resource advocate, Wayne Schacher, and Mark Armstrong, KTOS President.

It was a delight to spend this time with Billie as we found and recorded eggs and nestlings in the 40-plus boxes we visited.  Carolina Chickadees, Eastern Bluebirds, Tree Swallows and Carolina Wrens all nested in the boxes along the trail last season.  I was also on hand to assist with bluebird nestling banding, a new experience for me, but one that Billie handles with skill and tenderness.

Below, I've included an exerpt from the article that includes a story told by Colin Leonard:

Monitoring begins in March, Cantwell explains, and closes in August when nesting activities have ceased.  Once nesting is underway, the boxes are checked every 10 days, or sooner if nestlings are present, and in late fall, boxes are checked to make sure old nests are removed and needed repairs are identified.  For Leonard, the challenge is often these repairs and innovative renovations, like improving predator guards.

Leonard tells the story of one of these challenges, "I wanted to make and put predator guards on the front of the boxes.  To do so, I needed to know the average length of a racoon's arm.  No one could tell me, not even Mr. Google.  One day, we were on vacation somewhere in the boonies of Georgia and stopped for a drink at a bar.  Lo and behold, on the bar was a stuffed racoon!"  Leonard improvised to take the arm measurement and says, if any one is interested, it's nine inches long.  He adds this caution, "The shop-bought predator guards are only four inches and not long enough. Ours are now six inches and our loss to predation is almost zero."

In addition to discussing the monitoring activities of the nestbox trail at the Refuge, the article focuses on the conservation history of bluebirds and why it is so important to continue providing safe, predator proof nest boxes for this species, as well as, other secondary cavity nesters.  

To read the entire article, visit the TN Conservationist website (link below) and subscribe to the magazine or contact the editor, Louise Zepp, to obtain a copy.  The award-winning magazine is funded entirely by subscriptions and is relatively inexpensive to purchase.  Published six times a year, it brings news about natural and cultural conservation efforts in Tennessee, including descriptions of parks and preserves people can visit.

A special thank you to Louise Zepp, TN Conservationist editor, and to Billie Cantwell, Colin Leonard and Wayne Schacher for their assistance in making this article possible.

Links and informaton:
Third image:  Billie Cantwell banding an Eastern bluebird nestling.  Image four:  Cantwell removing the top of a nest box to monitor its contents.

TN Conservationist Magazine

More about my articles in the TN Conservationist and about bird-banding at Seven Islands Wildlife Refuge in this blog.  You may also want to visit the Seven Islands Wildlife Refuge website.