Figure 9. — Breeding and wintering ranges and migration of Harris's 

 sparrow, an example of a narrow migration route through the interior 

 of the country. The heavy broken lines enclose the region traversed 

 by the majority of these finches; the light broken line encloses the 

 country where they occur with more or less regularity; while the spots 

 indicate records of accidental or sporadic occurrence. 



Among land birds that have a definite migration, the Ipswich spar- 

 row has what is probably the most restricted migration range of any 

 species. It is known to breed only on Sable Island, Nova Scotia, and it 

 winters along the Atlantic coast south to Georgia. Living constantly 

 within sound of the surf, it is rarely more than a quarter of a mile 

 from the outer beach, and is entirely at home among the sand dunes 

 and their sparse covering of coarse grass. 



Harris's sparrow supplies an interesting example of a narrow migra- 

 tion route in the interior of the country (fig. 9.) This fine, large finch 

 is known to breed only in the region from Churchill, on the west shore 

 of Hudson Bay, northwest to the shores of Great Bear Lake. Very 



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