Fall Field Ornithologist Update: Week 2
Yearly seasonal finch movements are irregular. Migrants are driven south by winter food availability. An impressive Type 2 (Ponderosa Pine) Red Crossbill dispersal continued into this week. A small number of Type 4 (Douglas-fir) were also recorded. Red Crossbills have at least ten different distinct “call types” across North America. These call types correspond [...]