I was musing on the value of learning bird topography this morning, wondering why it is so important to know the greater coverts and supercilium and all the rest. The easy answer is that it gives us a framework to describe the color patterns of birds, but I think there’s even more to it than [...]
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posted April 16th, 2012; last edited April 16th, 2012 –– David Sibley posted April 13th, 2012; last edited April 14th, 2012 –– David Sibley Update: Congratulations to Vjera, the winner of this week’s prize drawing! Thanks to all who entered. Watch for another giveaway next week. The quiz prize drawing is back for another round If you get all three questions correct, be sure to click the “Get Results” button at the end of the quiz and submit [...] posted April 10th, 2012; last edited April 9th, 2012 –– David Sibley This week’s quizzes will be looking at some warblers, in anticipation of the spring migration. With thanks, again, to Brian E. Small for providing the beautiful photos. You can see lots more at his website. Warblers 1 Please wait while the activity loads. If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled. Congratulations – you have completed Warblers 1. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%% Your answers are highlighted below. Question 1 The species is: There are 2 questions to complete. You have completed All doneNeed more practice!Keep trying!Not bad!Good work!Perfect! You can read more about bird topography in my book Sibley’s Birding Basics. posted April 6th, 2012; last edited April 6th, 2012 –– David Sibley Update: Congratulations to Alvan, the winner of the Backyard Birds poster. Thanks to all who took the quiz and entered. The response was fantastic, and keep watching for another prize giveaway in the near future. Today’s quiz introduces a new feature – a prize! If you get all three questions correct, be sure [...] posted April 5th, 2012; last edited April 5th, 2012 –– David Sibley With thanks to the online wing collection of the Slater Museum of Natural History, University of Puget Sound for allowing the use of their wing photos. With thanks, again, to Brian E. Small for providing the beautiful photos. You can see lots more at his website, and clicking any of his [...] posted April 4th, 2012; last edited April 4th, 2012 –– David Sibley With thanks to the online wing collection of the Slater Museum of Natural History, University of Puget Sound for allowing the use of their wing photos. With thanks, again, to Brian E. Small for providing the beautiful photos. You can see lots more at his website, and clicking any of his [...] posted April 3rd, 2012; last edited April 3rd, 2012 –– David Sibley With thanks to the online wing collection of the Slater Museum of Natural History, University of Puget Sound for allowing the use of their wing photos. With thanks, again, to Brian E. Small for providing the beautiful photos. You can see lots more at his website, and clicking any of his [...] posted March 15th, 2012; last edited March 8th, 2012 –– David Sibley This quiz groups some relatively long and narrow wings. Pay special attention to subtle differences in shape, and bold white patterns. With thanks to the online wing collection of the Slater Museum of Natural History, University of Puget Sound for allowing the use of these photos. [...] posted March 13th, 2012; last edited March 8th, 2012 –– David Sibley Here is a quiz with three very different wings, and a detailed explanation follows (don’t peek). With thanks to the online wing collection of the Slater Museum of Natural History, University of Puget Sound for allowing the use of these photos. [...] posted March 10th, 2012; last edited March 10th, 2012 –– David Sibley Most birds have a very different pattern on the upperside and underside of their wings. On the coverts (the leading edge of the wing) this is easily explained because we are looking at entirely different feathers above and below. On the primaries and secondaries, however, there is just a single layer of feathers. How can [...] |
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