... The birds currently live atop the Cinesphere and the Pods, but with renovations coming to those, they are hoping the birds will relocate to these structures ...
I'm not an expert on birds, but it seems every time I hear about something like this intended to attract and be used by a specific type of bird (other than the ubiquitous sparrows and
starlings), it rarely works. As a kid I remember a neighbour having a bird house that was briefly inhabited by tree swallows, before seeing them forcibly evicted by sparrows ("
House sparrows are jerks"). Also, the common suggestion seems to be to put them "in areas away from human habitation", as the presence of people seems to attract the starlings, pigeons, and house sparrows, while discouraging most other species. Maybe having these structures only about 10 or 20 feet away from the benches and trail with its almost constant stream of joggers, cyclists, and dog walkers might not be the best place for them.
https://www.beco-birds.org/portfolio-item/barn-swallows-and-social-cues/
Barn Swallows typically nest on human-built structures... To mitigate the loss of nesting habitat, for example when an old barn housing a nesting colony is demolished, structures are being built specifically for the species to use for nesting. Unfortunately, it appears that these new structures are rarely used by Barn Swallows.
Edit: The
Ontario Place website does say :
A rope fence ... will be installed around the perimeter. Natural vegetation and planting are also being used as a deterrent. An interpretive sign asks people to kindly not disturb the birds ...
Another edit (May 13) : I saw swallows with forked tails (I assume Barn Swallows) flying over, ignoring the structures.
If the Barn Swallows were going to use something else at Ontario Place, wouldn't that nearby
Pavilion with its higher roof be more likely? There was a rope fence around two sides of the new structures, so maybe not yet finished. But less than a minute after I got close enough to see them, I saw a woman go past the end of the fence and walk around inside the fenced area right underneath all of the structures to look up into them -- not that it really mattered anyway as there's no birds there.