240 Jones, Bird Migration in Ohio. I j"ly 



them sing during their stay. There does not seem to be the rush 

 and hurry among the migrating birds at OberUn that was so 

 evident at Grinnell. I have wondered if the nearness of the lake 

 may not in part account for this more leisurely journey and 

 happier mood. It is certainly true that not a few of the species 

 which do not nest at Grinnell are found nesting on the lake 

 shore. Such close proximity to the summer home might well 

 cause greater ease of mind, and thus result in the changed con- 

 ditions which we have seen. It may be, however, that the birds 

 are only resting longer in order to be more fully prepared for 

 their long flight across the lake. As I write, the Blackburnian, 

 Black-throated Green, Chestnut-sided, Black-poll, and Bay-breasted 

 Warblers are singing. I never heard them at Grinnell. Not 

 one of the transient Thrushes ever condescended to sing for me 

 at Grinnell. Only the Hermit Thrush refuses to do so here. 



Lack of opportunity to study the bird life of the lake shore 

 carefully makes it impossible to speak intelligently, at this time, 

 of the direct influence of the lake upon the migrating host. That 

 it is considerable is made evident by the secondary effects already 

 noted. There can be no question that it acts as a barrier to the 

 further movement of some of the birds, causing them to nest on 

 its south shore. This is made evident by the immense numbers 

 of nests to be found, at the proper season, within a very restricted 

 area in the brush, trees, and swamps skirting the shore. In a 

 few hours I have found more than a hundred nests containing 

 either eggs or young, within a space of a few acres. I probably 

 discovered not more than one in ten of the nests actually in the 

 area. 



Turning now to the fall migration, we note at once that there 

 is a marked tendency for the earlier spring arrivals to remain 

 later in the fall, and for the later spring arrivals to return south 

 earlier. But there is no such definite order of departure as is 

 apparent in the spring. Irregularity is the rule. This is espe- 

 cially true of the transient visitors. The species which migrate 

 earlier in the fall are more irregular than those which migrate 

 later. 



The order of departure of the different species does not 

 materially differ from that at Grinnell. The late August wave 



