Are you referring to a hedgehog?It might be in your culture. But, in ours, an urchin is a nocturnal animal" nightly active" and quite rare to be seen at broad day.
Yes, this what meanAre you referring to a hedgehog?
I see from WordReference that the word "urchin" can refer to a hedgehog in some dialects, though I have never seen it used that way.
urchin - WordReference.com Dictionary of English
Urchin - Wikipedia
Hedgehogs may be largely nocturnal, but you do see them up and about in the daytime sometimes, and as far as I know they are not "proverbially" nocturnal in English.
It isn't a question of culture. It's a question of usage. Hedgehogs are much the same everywhere - it's not as if they decide "Oh, we're in India, so we need to be active during the day, but our cousins in Saudi Arabia can be nocturnal".But, in ours, an urchin is a nocturnal animal" nightly active"