Abstract
First arrival dates for 115 species of migratory breeding birds were gathered by 89 observers across the state of Maine during the spring migration of 1994. Arrival dates in the 15 Biophysical Regions of Maine, regions based on vegetational, climatic, and physiographic patterns, yielded insight into the tim? ing of spring migration. Unexpectedly, few species showed significant differ? ences in their average arrival dates among the Biophysical Regions. Most significant differences involved later arrivals in the far northern portion of Maine. Birds were not late in arriving in the Western Mountains compared to lowland areas of the state. The study provides the most intensive data for a single year on arrival dates of migratory breeding birds in Maine.
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