I use any type of apple, my gliders don't like the Gala apples, so I use red or green delicious or honey crisp.
You can use honey dew, but I am not sure about water melon. You can use watermelon as a treat.
Feathers-Sweetie, Sklyar Blue, Mister Peanut, Big Mack & Ibo
Fur-Widget, Gadget, Guinan, Mr. Spock, T'Mir, Micheal, Flower & Pappy
T'Pol, Pandora, Elizabeth & Curzon
TY, TJ & T'Pring
Forever in my heart, Gizmo, Tucker and the rest of my babies over the