I highly respect the amount of effort that was put into drawing each unique character in this single panel comic, especially in the day of copy-pasting heads in every panel, in a normal web comic fashion.
Cow
Cow, slice of pie, aliens, pig, invisible man, skeleton
Random eyeball. Fish tail. Foot in the overhead bin.
Dude with an arrow in his neck, fish tail, upside down bird.
What does the K2 name tag signify?
https://en.m.wikipedia.org/wiki/Bizarro_(comic_strip)
the abbreviation “K2” (referring to Piraro’s children Kaitlin and Killian),
As of 2008, Piraro indicates how many symbols are hidden in each strip with a number above his signature.[7]
Bird hanging from overhead bin, UFO with alien on one of the seat sides.
pig
Pig wearing a fez.
It’s important to recognize his achievement in getting membership to the club.
You have to love Pirarro.