I have just created a large set of new quizzes designed to test your skills at estimating numbers. You can enter the site at SibleyBirds.com, and you will also find a brief discussion of the art of estimating numbers. This is very much a “beta” version, so thanks in advance for your patience if anything doesn’t […]
Clicking on any image will open the full size image in a new window, so you can study the larger size and then return to the quiz – still in progress – in this window. Thanks to Martin Reid for allowing the use of his photos (and for counting the birds in each one!).
Below are six ducks in a typical foraging posture, with their heads underwater. See if you can identify the species by their back ends. (All paintings by David Sibley)
Test your “partial cues” recognition skills. Each photo shows only part of a common North American backyard bird. (All photos © David Sibley.)
Find the Greater Secondary Coverts These are some of my digiscoped photos from a recent trip to Belize, all taken at the fantastic Black Rock Lodge. On each photo body parts are labeled with letters, and your challenge is to identify the greater secondary coverts on each bird. Good luck!
The answer is at the end of the video, and in the text below. It has been a relatively mild winter in Massachusetts, but the blizzard of Feb 2013 put over two feet of snow on the ground, effectively eliminating most of the grassy and weedy habitat sparrows need. In such conditions the plowed edges […]
The three photos below show a Song Sparrow as it turns its head. Your challenge is to locate the plumage marking known as the lateral throat stripe in each photo. Photos ©David Sibley. Sep 2012, Concord MA.
Test your bird identification skills with the three photos below. These three sparrows were all photographed in Concord, MA on 11 Sep 2012. Can you identify the species? Today’s quiz features a bonus Everyone who submits a perfect score by noon Eastern Time tomorrow – Thursday September 13th – will be entered in a drawing […]
Another quiz to test your skill at estimating numbers of birds in flocks.
Here is a new quiz about the topography of the upperparts of a large songbird.