Yes, plant singular!
In the ongoing absence of time, money and space to put in the big rockery* with raised pond that I really want to do, I've decided to add a little bit of water to at least attract interests and have added a pair of sink-bowl ponds - hence plant singular!
Any ideas what I could put in them to help attract the critters? See pic - I think they'll look OK once they've been grown up around.
*I have, however, collected from the local fields on my lockdown exercise time not spent on the plot several tons of rocks, many flattish and just nice for building.