Vol. XII 

 189s 



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Jones, Bird Migration in Ohio. 



243 



is rather larger, being composed of five departures and one 

 arrival, with a decrease in numbers of five species. An early 

 September wave, consisting of five arrivals, six departures, 

 and a decrease of six species, is well marked from a late 

 September wave which consists of five arrivals, sixteen depar- 

 tures, and eight decreasing species. There are also two waves 

 in October: an early one including six arrivals, thirteen 

 departures, three increasing and six decreasing species ; and 

 a late one consisting of one arrival, eight departures, and four 

 decreasing species. The early November wave is composed 

 largely of decreasing species, all but two of which depart late 

 in the month. The early wave is composed of twelve species, 

 and the late one of thirteen. 



It thus appears that September is the favorite month for the 

 fall migrations, preference being given to the latter part of the 

 month. In point of the number of moving species, there is 

 very little difference between September and October; but 

 moving individuals are far more numerous in September than 

 in October. Eleven species were moving in August, forty-six 

 in September, forty-one in October, and twenty-five in November. 

 Thus November stands in much the same relation to September 

 that March does to May, April corresponding to October. The 

 relations of the movements by months may be more clearly 

 seen in the following table. By species common to any two 

 months is meant those found movins: in both months. 



Species com 



It is a little singular that species which do not arrive from 

 the south until May or April should be among the last to go 

 south in fall. Yet there are sixteen such. Three of the species 



