No fruit pits at all, no apple seeds, no peach pits, no apriocot pits, no cherry pits, none of those, they are all poison to birds. Do give it sweet potato or yams, and carrots, as they are very high in vitamin A which is a requirement for birds and one of the most frequenly seen as a deficiency, green leafs, like kale, mustard greens, romaine lettuce (not iceberg - it's nearly a zero for vitamins). Any vegetable you eat save some for your bird, minus the salt and butter. If your bird likes any dried fruits, it will probably like them fresh as well, so try mango, blueberries, and many birds LOVE peppers, seeds and all, even HOT SPICY ONES. Good lord I could go on and on in this topic lol
It is also important to note that many raw, uncooked beans can be poisonous to birds, but after they are cooked they are healthy and good for them, so don't feed your bird raw beans or just soaked - they must be cooked.
Another thing many birds LOVE is soaked seeds - put some seeds in water over night and they swell up and plump, and their chemistry changes and they are even more healthy for your bird. Seed sprouts are fantastic for your birds, like alfalfa sprouts, wheat sprouts, etc., outstanding and healthy.
And it sure woudn't hurt to buy a bag of frozen mixed vegetables (or Fruit!!) at the supermarket (make sure no sugar or salt added) and put some in a dish - they thaw quickly, and are very healthy.