Category: Science - Biology
Routes of migration 41 Wide and narrow migration lanes 42 The fly ways 46 Atlantic oceanic route 48 Atlantic coast route and tributaries 53 Mackenzie Valley--Great Lakes--Mississippi Valley Route and tributaries 60 Great Plains--Rocky Mountain routes 62 Pacific coast route 63...
The evolution of the migration route of the Pacific golden plover may be explained in a similar fashion. At first the route probably followed the Asiatic coast, through the Mala...
3. Part 3It seems more likely that migrations are performed in a leisurely manner, and that after a flight of a few hours the birds pause to feed and rest for one or several days, partic...
4. Part 4In concluding this discussion of orientation it is pertinent to point out that the migratory instinct appears to be more or less transitory, that it is not persistent over an ex...
2. Part 2This theory holds as its major premise that quantity of light and length of day are the stimulating causes of migration. Its proponents urge that migration is a phenomenon far t...
6. Part 6A study of the Canada geese that winter abundantly in the waters of Back Bay, Va., and Currituck Sound, N. C., reveals another important tributary to the Atlantic coast route. B...
9. Part 92. In the letter print the full number of the band, including the series designation and the serial number. The series designation may be a single letter or a two- or three-digi...
1. Part 1Routes of migration 41 Wide and narrow migration lanes 42 The fly ways 46 Atlantic oceanic route 48 Atlantic coast route and tributaries 53 Mackenzie Valley--Great Lakes--Missis...
5. Part 5A migration route, therefore, may be anything from a narrow path that adheres closely to some definite geographical feature, such as a river valley or a coast line, to a broad b...
8. Part 8Head winds are as unfavorable to migration as is rain or snow, as they greatly increase the labor of flight and cut down the speed of cross-country travel. If such winds have a...