From: Winnipeg, MB
So the male birds did change their tune and are doing so again. The question is, does it help get the females:
Twenty-year study tracks a sparrow song that went 'viral' across Canada
Most bird species are slow to change their tune, preferring to stick with tried-and-true songs to defend territories and attract females. Now, with the help of citizen scientists, researchers have tracked how one rare sparrow song went "viral" across Canada, traveling over 3,000 kilometers between 2000 and 2019 and wiping out a historic song ending in the process. The study, publishing July 2 in the journal Current Biology, reports that white-throated sparrows from British Columbia to central Ontario have ditched their traditional three-note-ending song in favor of a unique two-note-ending variant—although researchers still don't know what made the new song so compelling.
"As far as we know, it's unprecedented," says senior author Ken Otter, a biology professor at the University of Northern British Columbia. "We don't know of any other study that has ever seen this sort of spread through cultural evolution of a song type." Although it's well known that some bird species change their songs over time, these cultural evolutions tend to stay in local populations, becoming regional dialects rather than the norm for the species. This is how the two-note ending got its start.
Just the younger generations shortening things because they are too lazy to sing all the notes, or because of the internet ...
No matter how bad a situation is, you can always make it worse. - Chris Hadfield : An Astronaut's Guide To Life On Earth