Data from the trackers on eagles is now showing scientists, in greater detail than previously conceived possible, what the eagles are doing once they are out of eyeshot
There are now three North Shore eagles donning backpacks and trackers, allowing us to keep an eye on their movements in almost real time.
Bee’s mother Annie, who is part of a lineage of eagles nesting around Lighthouse Park since then 1960s when there were only three nests remaining in the Lower Mainland, was the first North Shore eagle to have one. Data from the trackers on eagles like Annie and Bee is now showing scientists, in greater detail than previously conceived possible, what the eagles are doing once they are out of eyeshot, McDermott said.
In the past, eagle watchers have seen highly territorial, established eagle pairs tolerating juvenile outsiders on their turf . Eagle expert David Hancock said they’ve speculated that the newcomers may be the offspring coming home for a visit, but the data now coming in from trackers on other juvenile birds shows that, so far, not one has returned to the area where they hatched.“What we do know is so small compared to what we want to know,” Hancock said.
Bald eagle population rebounding The species has come back from near extinction in the 1960s to a flourishing 600 known mated pairs in the Lower Mainland, but an outbreak of avian influenza caused “hundreds and hundreds” of B.C. eagles to die in 2021, Hancock said. Eagles face persistent threats from habitat loss, pesticides, microplastics, loss of prey and food to scavenge, and, of course, climate change, Hancock said. For now, though, he’s encouraged by 2023’s successful fledges.
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