ROUTES OF MIGRATION. 11 



TEXAS TO MEXICO BY LAND. 



Some individuals of the following species enter eastern Mexico by 

 land from Texas. With one exception they represent species whose 

 winter home is more commonly reached by a flight across the Gulf 

 of Mexico. The exception is the orange crowned warbler {Ilehmn- 

 thophila celata) which seems to avoid a water trip and to go entirely 

 by land to Mexico. 



Black and white warbler {Mniotilta varia). 

 Blue- winged warbler {Helminthophila pinus) . 

 Nashville warbler {Helminthophila ruhricapilla) . 

 Orange-crowned warbler {Helminthophila celata). 

 Tennessee warbler {Helminthophila peregrina). 



Parula warbler {Compsothlypis americana). , 



Yellow warbler {Dendroica sestiva) . 

 Myrtle warbler ( Dendroica coronata) . 

 Magnolia warbler {Dendroica maculosa). 

 Chestnut-sided warbler {Dendroica pensylvanica) . 

 . Blackburnian warbler {Dendroica blackhurnise) . 

 Sycamore warbler {Dendroica dominica alhilora). 

 Black-throated green warbler {Dendroica virens). 

 Oven-bird {Seiurus aurocapillus) . 

 Water-thrush {Seiurus noveboracensis) . 

 Louisiana water-thrush {Seiurus motacilla). 

 Northern yellow-throat {Geothlypis trichas brachidactyla) . 

 Western yellow-throat {Geothlypis trichas occidentalis) . 

 Yellow-breasted chat {Icteria virens). 

 Hooded warbler ( Wilsonia mitrata) . 

 Wilson warbler ( Wilsonia pusilla) . 

 Canadian warbler {Wilsonia canadensis). 

 Eedstart {Setophaga ruticilla). 



Of the species just given, a few show a tendency to migrate farther 

 west than the others. In general it may be said that the winter range 

 is seldom west of the breeding range. The principal direction of 

 migration is of course south, and those individuals that have a choice 

 of moving to the east or to the west of south almost always proceed 

 eastward. An exception to this rule is found in the case of the 

 following species, which extend in western Mexico to the localities 

 mentioned: 



Black and white warbler {Mniotilta varia). Mazatlan. 

 Sycamore warbler {Dendroica dominica albilora). Tepic. 

 Oven-bird {Seiurus aurocapillus) . Mazatlan. 

 Louisiana water-thrush {Seiurus motacilla). Mazatlan. 



It is noteworthy in this connection that two of these, the black and 

 white warbler and the oven-bird, have been taken as rare visitors to the 

 Rocky Mountains; and it is possible that it is these western stragglers 

 that winter in western Mexico. 



