Migration Group Chart 



87 



Bluebill or Scaup Duck, and Herring Gull. (G) The Irregular Visitants (IV) 

 are those which are not properly members of the avifauna of the area, but 

 which, apparently, by pure chance or accident, straggle into the area from 

 time to time. In the northern part of Xew York state examples of this group 

 are the Evening Grosbeak and the Cardinal. 



It will be noted that, in our latitude, the spring migration is from the south 

 toward the north in the case of each group, and is represented by the upper 



NORTH 



- LOCALI TY — 



SOUTH 



MIGRATION' BIRD GROUP CHART 



lines of hea\y, cross-barred arrows, while the fall migration is in the opposite 

 direction and is represented by the lower lines of pjlain-shafted arrows. The 

 arrows which show" the routes of the Irregular Visitants are intended to indicate 

 that their arrivals and departures are capriciously north, south, east, or west. 

 For restricted areas where a bird migration record is Ijeing kept, such a 

 chart is very helpful. It can be expanded and space sufficiently large left under 

 the name of each group to enable the listing there of all the birds belonging to 

 the group, ^^-ith the dates of their arrivals and departures. 



