Tree guy, pretty sure those are all maple. Poplar have pinate leaves with a serated edge, the leaves in the picture appear to have 3 lobes. Also poplar bark is rather smooth, while maple species frequently develop that furrowed bark pattern when they mature. These look to be more than 50 but less than 100 years old based on diameter at breast height.

Aye, which is why I said trees are better than no trees. I'm not advocating for ripping them out or anything ridiculous like that.

Just that when people see pictures like this, because there's trees, they think it's nature. It's good. And yes it's better than nothing, and it supports some life, but it could be so much better.

I don't buy the argument that just because a city is old it should be absolved of its duty to nature. Poplar trees don't get particularly old as trees go, all of these will have been planted sometime in the last 100 years. Future plantings should be sporadic, to mimic nature, but due to tradition and the normalisation of perfect rows most around the world still aren't. People like their perfect neat rows, nature be damned.