Table of Distribution and Occurrence. 



The following table has been compiled in the hope that 

 wherever the bird student may be in the northern states, 

 east of the Mississippi river, he may have at hand for com- 

 parison the results of some reliable observer in the same or 

 a nearby area. No better method of gaining a clear idea 

 of the movements of birds can be suggested than to study 

 carefully their distribution and occurrence within related 

 areas. In order to do this understandingly, the main topo- 

 graphic features, taken as a whole or state by state, should 

 be considered. The bird population of any region will be 

 found to be closely related to its mountains, river basins, 

 prairies, forests and wet or dry areas. 



Attention is called to the meeting and intermingling 

 of the Carolinian and Alleghenian faunal areas in these 

 northeastern states. The teacher of geography as well as 

 the bird student will find great interest in following out the 

 limits of life conditions in these areas. 



The table contains in addition to the 200 species already 

 described, 148 species of frequent but rarer occurrence 

 throughout the area covered. It should be said that con- 

 siderable difficulty lies in the way of reducing to a few 

 arbitrary symbols the notes of several ornithologists whose 

 data are not equally complete and who may not use the 

 same descriptive terms, or who may attach a different sigifi- 

 cance to the same terms. The authors nevertheless have 

 earnestly tried to interpret correctly each authority cited 

 and trust that the useful features of the result will outweigh 

 its shortcomings. 



The varying dates of the pubished lists for the different 

 localities given should be kept constantly in mind in making 



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