22 



BULLETIN 1165, U. S. DEPARTMENT OF AGRICULTURE. 



Table 7. — Relative abundance of the six species reported most abundant on areas sur- 

 veyed in the Northeastern and North Central States, showing the percentage of the total 

 bird population and the number of nesting pairs per hundred acres. 



Species. 



Relative abundance: 



Robin 



Catbird 



Song sparrow 



Chipping sparrow . 



Meadowlark 



English sparrow... 



Average population per 100 acres: 



Robin 



Catbird 



Song sparrow 



Chipping sparrow 



Meadowlark 



English sparrow 



Northeastern States. 



1916 1917 1918 



Per 

 cent. 

 10.4 

 2.1 

 6.7 

 5.3 

 1.8 

 5.4 



Per 

 cent. 

 10.8 

 2.1 

 10.8 

 4.1 

 1.8 

 6.4 



Pairs. Pairs. 



14- 



3- 

 9- 



7+ 

 2+ 



7+ 



11+ 

 2+ 



11+ 

 5+ 



2- 

 6+ 



Per 

 cent. 

 8.9 

 1.5 

 11.3 

 4.1 

 0.7 

 4.9 



Pairs. 



9- 

 2- 

 11+ 

 4+ 

 1- 

 5- 



1919 



1920 



Per 



Per 



cent. 



cent. 



4.0 



7.3 



1.5 



1.1 



3.3 



6.4 



2.1 



4.2 



0.4 



0.5 



1.7 



2.8 



Pairs. 



Pairs. 



7- 



11- 



3- 



2- 



6- 



9+ 



4- 



6+ 



1- 



1- 



3- 



4+ 



Aver- 

 age. 



Per 



cent. 

 8.3 

 1.7 

 7.7 

 3.9 

 1.0 

 4.3 



Pairs. 

 10+ 

 2+ 

 9+ 

 5^- 

 1+ 

 5 



Species. 



Relative abundance: 



Robin 



Catbird 



Song sparrow 



Chipning sparrow . 



Meadowlark 



English sparrow... 



Average population per 100 acres: 



Robin 



Catbird 



Song sparrow 



Chipping sparrow 



Meadowlark 



English sparrow 



North Central States. 



Per 



cent. 

 6.1 

 2.8 

 3.1 

 1.4 

 4.0 

 7.8 



Pairs. 



8+ 

 4- 

 4+ 

 2- 

 6+ 

 10+ 



1917 



Per 



cent. 

 6.4 

 2.9 

 3.1 

 1.3 

 3.4 

 10.1 



Pairs. 

 8+ 

 3+ 

 4- 

 2- 

 1+ 

 13- 



1918 



Per 

 cent. 

 6.7 

 1.6 

 2.4 

 1.9 

 2.3 

 8.2 



Pairs. 

 10- 

 2+ 

 4- 

 3- 

 3+ 

 12+ 



1919 



Per 



cent. 

 5.9 

 2.8 

 2.2 

 1.2 

 6.2 

 6.9 



Pairs. 

 8+ 

 4- 

 3+ 

 2- 

 8+ 

 9+ 



1920 



Per 

 cent. 

 5.9 

 2.5 

 3.0 

 1.8 

 4.3 

 10.5 



Aver- 

 age. 



Per 



cent. 

 6.2 

 2.5 

 2.8 

 1.5 

 4.0 

 8.7 



Pairs. Pairs. 

 7+ 8+ 



It' 



2+ 

 5+ 

 13- 



3+ 

 3 

 2 



5+ 

 11+ 



. 



In the States north of North Carolina and east of the Mississippi 

 River the robin is the most abundant species. Of some 200 reports 

 received from this part of the country during the past five years, only 

 6 do not record the robin; 4 of these deal with woodland and the 

 other 2 with the same tract of farm land in two successive years. 

 The densest robin population was found at Chew Chase, Md., where 

 in 1916 31 pairs nested on 23 acres. This was in a residential dis- 

 trict in the suburbs of Washington. D. C, where the shade and 

 fruit trees about the houses furnished plenty of convenient nesting 

 sites and an abundant food supply. But on farm land, there were 

 found near Commack, N. Y., in 1916, 30 pairs nesting on 45 acres; 

 at Gettysburg, Pa., in the same year, 31 pairs on 40 acres; near 

 Geneva, N. Y., in 1918, 48 pairs on 92 acres (nearly half of it in 

 orchard); and at Putnam, Conn., in 1920, 29 pairs on 60 acres. 

 Though in the North Central States the robin stands second in point 

 of abundance, when these records are combined with those from the 

 Northeastern States the robin becomes first for the whole region. 



