. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 40 BULLETIN 185, U. S. DEPARTMENT OF AGRICULTURE. judgment in regard to members of other groups. Thus, although a cer- tain general tendency is observable, each species presents a separate problem, to be solved for the most part only by patient, painstaking ^ BREEDING RANGt M WINTER HOME ,« EAST AND lA^EST LIMITS OE MIGRATION ROUTE Fig. 18.—Distribution and migration of ttie red-eyed vireo ( Vircosylva oUvacca). An example of a lately extended breeding range and migration route. It is evident that the spe
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 40 BULLETIN 185, U. S. DEPARTMENT OF AGRICULTURE. judgment in regard to members of other groups. Thus, although a cer- tain general tendency is observable, each species presents a separate problem, to be solved for the most part only by patient, painstaking ^ BREEDING RANGt M WINTER HOME ,« EAST AND lA^EST LIMITS OE MIGRATION ROUTE Fig. 18.—Distribution and migration of ttie red-eyed vireo ( Vircosylva oUvacca). An example of a lately extended breeding range and migration route. It is evident that the species has only recently invaded Washington by an extension almost due west from the northern Mississippi Valley, and that it still migrates spring and fall along the route originally traversed in this extension. (See p. 37 and also fig. 19.) RELATIVE POSITION DURING MIGRATION. Spring migration has its own special features, and no such syn- chronous movement then occurs as has been described as "normal. 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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