View source for Translations:AY Honors/Birds - Advanced/Answer Key/31/en

===Similar schemes===
====Wing tags====
[[Image:Wing tag Great Frigatebird.JPG|thumb|300px|left|This female Great Frigatebird has been tagged with wing tags as part of a breeding study]]
In some surveys, involving larger birds such as eagles, brightly-colored plastic tags are attached to birds' wing feathers. Each has a letter or letters, and the combination of color and letters uniquely identifies the bird. These can then be read in the field, through binoculars, meaning that there is no need to re-trap the birds. Because the tags are attached to feathers, they drop off when the bird moults. '''Imping''' is the practice of replacing a bird's normal feather with a brightly-colored false feather. A '''patagial tag''' is a permanent tag held onto the wing by a rivet punched through the [[W:Patagium|patagium]].