. [Articles about birds from National geographic magazine]. Birds. BIRD BANDING, THE TELLTALE OF MIGRATORY FLIGHT 93 ^^«r-. © E. H, Matern IJKB ALIv GOOD SAII^ORS, THIS GUIX HAS A CHOICE VOCABUI^ARY When there is no garbage about to be picked up, tlie Herring Gulls feed largely on small shellfish, sometimes breaking open the shells by carrying them well up into the air and then dropping them on the rocks. This operation has frequently to be repeated several times before the desired result is obtained. eastern Asia and the Alaskan mainland tliat have been found there. SYSTEMATIC BIRD BANDING IS
. [Articles about birds from National geographic magazine]. Birds. BIRD BANDING, THE TELLTALE OF MIGRATORY FLIGHT 93 ^^«r-. © E. H, Matern IJKB ALIv GOOD SAII^ORS, THIS GUIX HAS A CHOICE VOCABUI^ARY When there is no garbage about to be picked up, tlie Herring Gulls feed largely on small shellfish, sometimes breaking open the shells by carrying them well up into the air and then dropping them on the rocks. This operation has frequently to be repeated several times before the desired result is obtained. eastern Asia and the Alaskan mainland tliat have been found there. SYSTEMATIC BIRD BANDING IS A MODERN DEVELOPMENT Systematic marking of birds, each prop- erly recorded for the purpose of studying movements and habits, has developed in Europe and the United States within the past 30 years. The greatest advance has been since 1920 and it is now becoming a well-recognized line of research. Investigators familiar with the bird life of their districts capture the birds, alive and unharmed, with many ingenious traps, and place a numbered aluminum band or ring on the leg of each. Each band bears a central address, so that whenever the bird is retaken, alive or dead, the finder may forward either the band or the num- ber on it. The use of l)irds as messengers by man began in the dim past. Perhaps the earli- est record is that of Noah, who is said to. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Washington, D. C. : National Geographic Society
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