Here you go, my friend:
European ash, birch, cedar, oak, white and black poplar. Here the distinction between cottonwood and poplar does not exist. Both white and black poplars produce the same fluffy, furry, cotton-like aerial seeds like American cottonwoods.
The main difference between white and black poplar is the shape and their favourite growth environments. White poplar is what we call here a water tree, it thrives wherever there's a lot of water nearby, preferably along small streams, ponds and river banks. Here you can follow rivers and any kind of streams from the air just by following the white poplars, their shape is akin to any broadleaf tree and their bark almost as white as birch bark is.
As you can see below, black poplars are shaped like a spearhead, they are not...