This little dude is about 5 months old and just lost his red neck band, still has his red belly though:
Mussies are a lot of fun. Very inquisitive with a hell of a feeding response. This is a species you want to remove from the cage during the daylight hours.
Sometimes the babies can be tricky to get eating and in the past I have saved shed snake skins to wrap pinky mice in. Once on rodents, they start putting on size quickly.
Rear-fanged and venomous and a steel spring of a constrictor to boot. Unless you smell like food, they are not inclined to bite and are mellow to handle.