young is confirmation of breeding for both cowbird and host species. 

 b Indirect or circumstantial evidence of breeding. 



1. Singing males or territorial birds observed in suitable nesting habitat during the 

 breeding season. 



2. Courtship behavior or copulation. 



3. Adults visiting a probable nest site. 



4. Agitation behavior, distraction display, feigning injury, or anxiety call from an adult. 



5. Nest building. 



6. Physiological evidence of breeding (brood patch or eggs in oviduct) based on bird 



in hand. 



t No evidence of breeding. Transients, migrants, or wide ranging species that exhibit no 

 breeding behavior at the time observed. 



— No records 



Winter Distribution Maps 



The winter distribution of species is recorded between December 15 and February 15. 

 Winter maps display data in latilong blocks only. However, the Montana Bird Distribution 

 Database does record winter quarter latilong information for all post-Third Edition data. The 

 symbols used are defined as follows: 



W Overwintering. Regular sightings during the winter period. 



w Overwintering not yet documented, but species observed at least once between 

 December 15 and February 15. 



— No records 



Subspecies Maps 



Birds for which information is requested at the subspecies level are listed in Appendix B. 

 Subspecies maps appear directly after the species map. For example, following the Northern 

 Flicker map, there is a map for both the Red-shafted and the Yellow-shafted Flicker subspecies. 



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