I remember as a child in the early 90s reading a book at an older relative’s house, I think it had belonged to one of her children who were much older than me, so probably published in the 1970s or 1980s. It was a non-fiction book about nocturnal wildlife in an urban setting - lots of owls, foxes etc. I remember loving the illustrations in it. It had a paperback and was quite a thin book, and I think the design, fonts on the cover etc had a 70s feel to them.
I’ve googled many times and never can find it as I don’t know the exact name. Sadly was cleared out of the relatives house years ago also.