This is a modified version of the Original Bird Buddy Perch that was distributed for free (see https://www.facebook.com/groups/birdbuddycommunity/files/files).
The Birdbuddy perch works well with the fence from kaltmann (see last photo): https://www.thingiverse.com/thing:5707127
just use two M5 screws.
The author marked this model as their own original creation.