Well..yes, but not from the birds. Like most people, I use my primary hand for most 'step ups' and I write and draw with that hand too. The callous is from being an artist, not a bird momma.
Eclectus, CAG, BH Pionus, Maximilian’s Pionus, Quakers, Indian Ringnecks, Green Cheeked Conures, Black Capped Conures, Cockatiels, Lovebirds, Budgies, Canaries, Diamond Doves, Zebra Finches, Society F
I don't have any callouses, but I do have a lot of freckles on my right hand (bird hand). They seem to form whenever extra sharp talons pierce skin. You can totally see a pattern on the back of my hand where scaly toes go:20: