squirrels in the park are extremely friendly. You can easily bribe their attention with suitable raw nuts, walnuts, hazelnuts, almonds and others
A good macro lens did a great job for me at 180mm length at 2.8 aperture
it turned out that the squirrels at this time of the year have thick fur and a rather guarded appearance
besides squirrels, people also feed wild birds. I managed to capture many Tits a woodpecker, a jay, a woodpecker, a sissy tit and a few others whose names I don't know
I shoot with a Nikon system, the body is D7200