LINES OF MIGRATORY FLIGHT 159 



cutd) and the Pacific swift {Micropus pacificus) as 

 the only other species that perform regular flights 

 to this far-distant land, where they remain during 

 the northern winter. These two occur regularly 

 and penetrate to the southern portion of the con- 

 tinent. There are a few other species as the corn- 

 crake {Crex crex), a yellow wagtail {Budytes flava 

 simillima), the parasitic jaeger {Stercorarius para- 

 siticus) and the upland plover {Bartramia longi- 

 cauda)y which have occurred in Australia casually, 

 but cannot be considered regular visitants. Few of 

 the winter residents go farther than Australia, so 

 that records of northern migrants for Tasmania and 

 New Zealand are in the main casual or accidental, 

 and are based on few occurrences. In New Zealand 

 the only regular migrant seems to be the Pacific 

 godwit {Limosa lapponica baueri), though there 

 are a few records for the knot, curlew sandpiper, 

 and the Pacific turnstone, which indicate more or 

 less regular arrival among these birds. The corn- 

 crake, the two swifts that come to Australia, the 

 parasitic jaeger, and a long list of shore-birds have 

 been included in the New Zealand list but only on 

 basis of from one to three records. 



Among native Australian birds there may be 

 recognized two groups, a small band that is regu- 

 larly migrant with the season, and a greater number 

 that are so irregular in occurrence that they have 



