Birds near Minco OJi 



GENERAL SUMMARY 



1. The average number of consecutive calls apparently dimin- 

 ished in direct proportion to the advancing season. 



2. The hour at which the evening calls began also averaged 

 earlier (by the clock) as the season advanced. 



3. The calls were more vociferous and more rapidly given at 

 the beginning of the season. In fact the calls sometimes were given 

 so rapidly that it was difficult to count them. 



4. The calls became more labored and irregular and the 

 'cluck' more audible toward the end of the summer. 



5. The length of interval between series of calls increased as 

 the season advanced. Both the energy and the incentive for pro- 

 tracted calling were probably lacking toward the close of the breed- 

 ing season. 



BIRDS OBSERVED NEAR MINCO, CENTRAL 

 OKLAHOMA — AN ADDITION. 



Ill the Wilson Bulletin for 11)18 ^ in the numbers for 

 March and June the writer published a short paper en- 

 titled '' Birds Observed near Minco, Central Oklahoma," 

 giving a synopsis of field observations made at that locali- 

 ty in 1905. This article, as originally written, and as it 

 apj)eared wlien read in galley proof, covered a list of 62 

 species. For reasons unknown when the printer came to 

 make up pages for the June number, the last four species 

 (numbers 59 to 02) of this list were omitted. Later when 

 he printed author's separates of this article the missing 

 matter was discovered, put in at the proper place and then 

 printed, while in addition the pagination and arrangement 

 of the second installment were clianged to make them con- 

 secutive with the first. This was not discovered until a 

 short time ago. 



In order to make current the additional information 

 contained in the author's separate the four species omitted 

 in the original are herewith reprinted as they should have 

 appeared in the Volume for 1918, page (51. 

 ^Wilson Bulletin, Vol. XXX, March, June, 1918, pp. 2-10, 56-61. 



