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Fwd: [birds-pix] Bird counting exercises

 To: birding-aus <> Fwd: [birds-pix] Bird counting exercises "Tom Tarrant" <> Wed, 6 Dec 2006 14:50:02 +1000
 ```Hi All, Just cross-posting this from the Birds-Pix Mailing-List.......a very interesting exercise! Tom ---------- Forwarded message ---------- From: David Seibel Date: Dec 6, 2006 12:35 PM Subject: [birds-pix] Bird counting exercises To: Birds-Pix As Christmas Bird Count season approaches, I've been playing with some techniques for honing my skills at estimating bird flocks and thought some of you might enjoy them as well. First, here's a nice Java applet written in 2002 by Stig Christensen that will really test your perception of flock sizes: http://staff.jccc.edu/dseibel/birds/birdcount.htm It's excellent practice, and each time you play it the flock sizes change randomly. I've personally tested the accuracy of the numbers by freezing the action in several samples and counting the birds individually. A Google search for "bird flocks estimate" will yield a couple more practice exercises (with static images), and I inadvertently made another one of my own while experimenting with a new camera and lens last weekend. I made a composite of about 40 shots of Eastern Bluebirds (Sialia sialis), plus a Blue Jay (Cyanocitta cristata) and a Dark-eyed Junco (Junco hyemalis), taken in 5 or 10 minutes at a local park last Sunday, and I think the result is kind of interesting. I reduced the dimensions by 50% and decreased the JPG quality, but the image is still too big to post here (773 Kb), so here's a link for anyone who wants to take a look: http://staff.jccc.edu/dseibel/birds/2006-12-03_EABL_2881.jpg I think I'll call it "A Sky Full of Blue" for obvious reasons. How many birds do you see? Hope you enjoy it! Image details: Canon 1D Mark IIN, Canon EF 300mm f/2.8L IS, multiple exposures, handheld. David Seibel Lenexa, Kansas USA m("jccc.edu","dseibel"); www.davidseibel.com -- ******************************** Tom & Marie Tarrant Samsonvale, Qld http://www.aviceda.org http://wildlife.vodpod.com/ ******************************** =============================== www.birding-aus.org birding-aus.blogspot.com ```To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line) ```to: m("vicnet.net.au","birding-aus-request"); =============================== ```
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