They are not expecting any angry birds, but bird-watchers are already seeing evidence of what is expected to be a major invasion of hungry birds winging through the region.
Normally content to hang out in the deep forests of Canada, grosbeaks, pine siskins, finches, redpolls and other seed-eaters are winging their way south, hoping to find something to eat. The tree seed crop, normally plentiful in the forests of Ontario and Quebec, has in some cases failed completely, causing what is known as a bird irruption.
“The invasion is under way,” said David Small, president of the Athol Bird and Nature Club and one of the Central Massachusetts bird count leaders. “I had redpolls Sunday at the home feeder, which don't show up every year, and often not until January or February.”
Mr. Small, who is a supervisor at the Quabbin Reservoir, said he has been seeing pine grosbeaks at the reservoir headquarters and several locations. Central Massachusetts birders also report seeing white-winged and red crossbills.
“I was at Plum Island and Salisbury in early November and saw 250-plus white-winged crossbills,” he said. “So a big year is upon us. I can't recall a year it started this early with such diversity and large numbers.”
Based on data from ornithologists in Ontario, the National Audubon Society issued a winter bird warning — not really warning of disaster — that because there is so little to eat up north, a bird invasion is under way. The warning was issued more for the interest of those who will take part in the Audubon's Christmas Bird Count, which takes place all over the country from Dec. 14 through Jan. 5. The bird count often offers up data to support what ornithologists are predicting based on climate conditions. The seed crop failure may have been connected to a lack of rainfall. Central and Eastern Canada experienced long-term drought conditions this year.
Over the years, some species of seed-eating birds have been seen in small numbers; some are not seen for several years at a time, but the region saw a flood of pine siskins pass through in October and November. The birds enjoyed what they could get from the limited number of feeders out in Central Massachusetts at the time and headed off, possibly making their way as far south as North and South Carolina.
This year's small bird irruption followed a banner year for the eye candy of wild birds — snowy owls. The large white raptors were seen throughout the country as they, too, went off in search of food.
Irruptions occur regularly when food supplies of various types are disrupted. In the case of the owls, it was a lack of small mammals for them to eat.
Local birders have been keeping close watch on the ebb and flow of species. Recently there have been reports on WPI's Central Massachusetts Bird Update list of pine grosbeaks at Quaboag Pond in Brookfield and Worcester Airport. There have also been large numbers of pine grosbeaks seen in downtown Westminster, Royalston Common and several areas of Gardner and Lunenburg.
Bill Cormier, co-owner of The Bird Store and More in Sturbridge, said bird activity has been very active this early winter.
“There was a big wave of pine siskins that came through here earlier in the season,” he said.
Mr. Cormier said he is interested to see what is collected during the Sturbridge Christmas Bird Count, set for Dec. 18. The count will be led by local bird observer Mark Lynch; after 24 hours of recording birds, volunteers will report their data to compilers at The Bird Store.
Along with bird counts in Athol and Sturbridge, there will be counts in Worcester, Uxbridge and Westminster.
Feeders are an important part of the bird-count effort, and Mr. Cormier said he recommends black oil sunflower seeds with some nuts mixed in.
“Nuts are a major ingredient,” he said.
The birds expected or already seen in this irruption are mostly regular sights in Central Massachusetts, although in smaller numbers, but a few are fairly rare.
“We rarely get a hoary redpoll,” Mr. Small said.
The hoary redpoll's range is mostly no farther south than the Canadian border, but Mr. Small said even it is a possibility this year.
The Athol and Worcester Christmas Bird Counts will be held Dec. 15, Westminster will be Dec. 23 and Quabbin and Uxbridge will be Dec. 29.