For three weeks every winter, thousands of volunteers across Canada take part in a research project in which they spend a day counting every single bird they see.
The annual Christmas Bird Count, which started in 1900, is North America’s longest-running citizen science project, according to Birds Canada. And with climate change impacting bird migration patterns, experts say it plays a significant role in tracking the effects of the changing climate on bird populations.
“It’s more important than ever right now to continue doing this because we now have 120-plus years of data,” said Birds Canada’s Yousif Attia, who co-ordinates the bird count in this country. “We’re starting to
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