Males ceres are a smooth color, sometimes purpley, sometimes light blue- but always navy when in breeding condition. Turk's cere has white rings around the nostrils, signaling that she is probably female and not in the mood for baby making
You will see her nose turn many colors in her life time. Sometimes it may be snow white, sometimes tan. If chocolate brown and crusty, you'll know your birdie wants to be a momma!