beak coloration

My GCC loves to rub and tap his beak on anything and everything, is this a normal behavior? I wasn't worried about it because I had heard they did this to show ownership but today I noticed his beak is becoming slightly discolored where he rubs it. He has a beak buffer and cuttlebones in his...

Hi everyone My 18-month old golden conure Samba has undergone a change in beak color since he was a baby and I'm wondering if I should be concerned. I'ver attached two photos. When he came to me his beak was entirely pinkish-horn colored, but in the last several months it has darkened...