CHIPPING SPARROW 115 



the species in the Garden was on April 14, 

 1906. In 1907 and 1908 the day of arrival 

 was April 18. The migration period is ex- 

 tended, for in 1908 it reached to May 21, 

 when a bird in song was in the Garden and 

 another was singing on the Common ; twice 

 it has reached to May 22, namely, in 1902 

 and in 1906, on both occasions a bird in song 

 being noted ; and in 1907 a bird was present 

 and singing on May 28, not having then 

 reached its nesting-haunt. In 1905 the mi- 

 gration covered thirty-three days ; in 1906, 

 thirty-nine days; in 1907, forty-one days; 

 and in 1908, thirty-four days. 



Two birds, presumably a pair, as one was 

 much heard in song while the other was not, 

 remained four days in 1906, namely, from 

 April 19 to 22, suggesting a possible nest- 

 ing, but they then disappeared. Com- 

 monly one bird only has been noted in a 

 day, but there is one record of a small com- 

 pany, namely, four birds, on April 27, 1902. 

 Usually the Chipping Sparrow remains but 

 one day, as intervals of several days have 

 occurred between records of its presence. 



