Canadian Conifer and Deciduous Tree Seed Crops Affect New England’s Winter Bird Population
Every year Ron Pittaway publishes a forecast of the movements of winter finches in the upcoming winter (http://ebird.org/content/canada/news/ron-pittaways-winter-finch-forecast-2015-2016/). Although his report focuses on Ontario, he includes the effect that the Canadian seed crops have on northern New England’s winter bird population. A poor crop of a given seed (spruce, birch, etc.) in Canada inevitably drives finches that feed on that seed to search for food elsewhere, often further south. For instance, because White Spruce crops are low in Ontario this year and high in northern New England, we may well see high numbers of Pine Siskins (see photo).
Pittaway predicts we may also see higher than usual Purple Finch numbers (poor cone and deciduous tree seed crops in Ontario), perhaps White-winged Crossbills (poor spruce cone crop in Ontario), and more Common Redpolls (poor birch seed crop in Ontario) this winter. Time to fill feeders, sit back and see how accurate his forecast actually is!
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