Loon Take-off - photos by Yamuna Kollalpitiya and Saman
We lived among the loons last summer at Willoughby Lake, Vermont, - hearing their eerie calls, their dominance crowing, and their warbling "conversations". These magnificent birds can swim to substantial depths, fly amazingly fast, and live in both salt water (winter) and fresh water (summer). Their bones are substantially strong and heavy - in order to dive to great depth - and their wings are rather short for their weight in order to be efficient underwater swimmers. As a result loons require a long "runway" in order to take flight. On rare occasions we can get to see - and hear! - the take-off process. The loon has to run across the water, making great rapid paddling noises, flapping wings to build-up speed. After about 400 meters (1/4 mile) the loon slowly gains altitude.
These events are quite rare because loons spend almost
all of their time on the open water hunting for fish and
generally swimming around - alone or in groups of up to ~7
young adults. If a loon "lands" on a small pond it is
stranded because there is not enough room to take off
again. For more on Loon physiology and photos, see PPOW
for Sept. 9, 2011
Physics Photo of the Week is published weekly during the academic year on Fridays by the Warren Wilson College Physics Department. These photos feature interesting phenomena in the world around us. Students, faculty, and others are invited to submit digital (or film) photographs for publication and explanation. Atmospheric phenomena are especially welcome. Please send any photos to email@example.com.
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