What Do We Mean By "Invading"?
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Arrival dates for Common
Redpoll were exceptionally early that season. This species does not usually appear in numbers in
the United States until late-October or the beginning of November. That Evening Grosbeaks were
reported as far south as Tennessee by the end of November is also suggestive of the
magnitude of the invasion. Pine Grosbeaks made appearances in Iowa and New Jersey, where
there are relatively few records of this species.
The most exciting irruption that winter, though, was that of the White-winged
Crossbill.
The numbers and extensive southward
movement brought this finch into areas that have not reported White-winged Crossbills
since the 1970's. Hundreds were reported in Maine and Massachusetts, and their movement down
the Atlantic seaboard reached North Carolina. In the Great Plains, White-winged Crossbills were
seen in Iowa and as far south as Kansas and Missouri.
The 1997-98 winter presented
us with perhaps the most outstanding finch year in recent history. |