A BIR PLOVER'S YEAR 



Philippines, a third route trending ap- 

 parently towards the Burmese countries. 



Migration is not always direct from north 

 to south or vice versa. In Great Britain a 

 great stream of migration sets in from east 

 to west in the autumn, whilst in the Arctic 

 regions the migration of Ross's rosy gull 

 appears to be more from west to east. The 

 same phenomenon occurs in the Mediter- 

 ranean, where an east to west migration 

 crosses the lines of flight which extend from 

 north to south. But on this subject of 

 migration-routes one dare not be too dog- 

 matic, as undoubtedly there is still much to 

 be learnt on the matter. 



The enormous elevation at which some 

 birds fly has led a very eminent foreign 

 naturalist, Herr Gatke, to put forward the 

 theory that in these very high altitudes the 

 birds meet with far less air resistance than 

 in the lower levels, and are thus able to 

 accomplish their journeys at a greater 

 rate and with less fatigue. An American 

 naturalist, Mr. Scott, saw one night, through 

 an astronomical telescope, great numbers 

 of birds passing across the face of the moon, 

 and computation showed that these autumn 



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