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Bird counts in Alberta's Kananaskis Country hit record lows this winter, with shortages of evergreen cones cited as a cause.
Bird counts in Kananaskis Country, Alberta, hit record lows this winter, with only 449 birds and 29 species counted, far below the average of 1,216 birds and 34 species.
The lack of new cones on evergreen trees, which serve as a food source, is blamed for the decline.
The evening grosbeak has been absent for five years.
The University of Calgary's Biogeoscience Institute stores the birding data.
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Los conteos de aves en Kananaskis Country de Alberta alcanzaron mínimos récord este invierno, con escasez de conos siempreverdes citados como causa.