the south in the Antarctic, young Adelie penguins depart for 

 northern wintering grounds much earlier than adults. 



In a few species, adults depart south before the young. Adult 

 golden plovers, Hudsonian godwits, and probably most of the Arctic 

 breeding shorebirds leave the young as soon as they are capable of 

 caring for themselves and set out for South America ahead of the 

 juveniles. Likewise, data for the least flycatcher indicate adults 

 migrate before the young, but Johnson (1963) did not find this 

 segregation in the Hammond's flycatcher. In Europe, adult 



Cretzschmar's Bunting 

 Ortolan Bunting 

 Black-headed Bunting 



\ 



Average Number Captured Daily 



Cretzschmans Bunting 

 Ortolan Bunting 

 Black-headed Buntin 



March 



April 



May 



Figure 8. Average number of three species of buntings captured daily in mist nets 

 during spring migration atEilat, Israel, in 1968. Closely related species that migrate 

 through the same area often appear at different times. Thus species that may eat the 

 same foods do not compete with each other. 



37 



