47 
of vendors* mi® tin© oom from the north to cross above the aoologloal 
% 
Gordon® ami to bo lost toward tho south* If these shot©birds oan vltbfa) 
Si hours return to pass the same point they wore noted & weas pre¬ 
vious, it mat bo said that they were not far* probably in the Province 
of dorriuntoo utter e the winter is taoro open than in Buenos nlryBuCO.” 
2bo belief in a divided brooding ground for ©or tain shorobirda 
has received mere m less attention In earlier years* Shore are 
of birds as the Plad-billed Grebe, ainnswon Seal, JUlvocui Sr©e~dae*s» and 
may others that have a brooding range in both north and South *v3orlea* 
(Shore has never boon any indication howevsr of the breeding of such spoolee 
as t m Golden Plover, i&dsoalaa Go&wlt, tho two species of Ifcllaelsge and 
the other for m ©oasleered so migrants from Vm north* south of the equator* 
9 
She seat tor ad Individuals of those birds that rasnin in the ixgenttns 
i 
Bepttblio during the northern summer are wound©d, sterile or otherwise 
t 
diseased individuals that have boon unablo to perform the lout; flight 
northward, or that have ladoed the physiological lucentiv© to do so* She 
few supposed ©oourreocoa of their nesting have on investigation jrovea 
orroaoous* She migration and aevenentt of these specie# is 00 well under- 
v 
stood at yvmmt that there is absolutely no doubt but that they nest in 
me north and pass south of the equator only in migration* 
