When viewing our digital collections there are some media biases that might affect true representation of specimens:
Reducing image size for web presentation can sometimes result in resizing artifacts also known as Moir茅 patterns. These patterns are a form of aliasing resulting from the undersampling of complex patterns. Aliasing refers to the phenomenon of a new pattern arising from the original. In wings, Moir茅 patterns appear when the parallel barbs in feathers are undersampled when images are reduced in size. The Moir茅 patterns are not apparent in full resolution or properly resized images and do not naturally occur in the wings. Below are two pictures of a Wilson's Warbler wing: the left photo is affected by Moir茅 patterning and the right one is properly reduced in size.
Some pictures, such as this warbler, have been saved at a size that exhibits Moi茅 patterns. Images in the database may be thumbnailed at a size that results in Moir茅 patterning. If you see patterns, use the 鈥渮oom and pan鈥 from the top bar to view the image at a different percentage. The patterns often show at 33% and 66% and usually only on the smaller wings.