Friday, November 9, 2018

Red-breasted Nuthatch

2018 is a Red-breasted Nuthatch invasion year. Nuthatch influxes are caused by winter food shortages in their coniferous breeding grounds. When the nuthatches invade, they are not very particular about their habitat. They often visit bird feeders and can be found across most of the United States. Individuals have even been recorded in Iceland and Great Britain. In large flight years in some locations, over a thousand Red-breasted Nuthatches can be seen in an hour (Ghalambor and Martin 1999). On the other hand, during non-invasion years, these nuthatches may be completely absent outside their breeding range.

No comments:

Post a Comment