True to predictions, this has been an invasion year for the irruptive northern species of the boreal forests.

Of the four northern species observed this week, the snowy owl tops the list.

Evening grosbeaks are a favorite of mine. They have been virtually absent for the past 10 years or so but this year they have been seen regularly for...

Three species of mergansers visit the Vineyard at this time of the year. Two of them — the red-breasted and the hooded mergansers — are quite common...

A northern shrike was the most interesting sighting of the past week.

More late fall and winter residents have arrived this week, perhaps riding the blast of Arctic air we got on Thanksgiving and the day after. I can...

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