

Age and sex.lvAve\ often separately. Gatke 11. — Young Birds 

 prepare themselves for Migration. Emperor Frederic II. 7. — Whether 

 the young Birds depart before the old ones, could not be ascertained. 

 Barinqton. 5. 



Arrival. In the Arctic regions early and late migrants arrive simulta- 

 neously. MiDDENDORFF. 5. — The Seriatim arrival of the species in 

 various localities is not always uniform. Kessler 6. (This '\sno contradic- 

 tion).- In regions of the same climate Birds arrive nearly simulta- 

 neously. Homeyer. 13. 



Breeding place (Cf. also „Original home" p. 96). Is not necessarily 

 the original home of the species. Parker. 5. — Is not necessarily the 

 original home of the species. Martorelli. 13. — Is the home of the 

 species. Homeyer. 24. — Has no exclusive influence Menzbier 4. — 

 Has influence upon Migration. Gatke 15. 



Breeding zone. In the northern Hemisphere on the northernmost 

 limit of the range. Seebohm. 1. — In the northern parts of the range 

 of the species. Tristram. 1 . — Is not necessarily the coldest part of the 

 Migration region. Martorelli. 14. 



KD 57 «9 



