Advertisement I've gotten it as a juvenile without a Christmas tree pattern, so I don't know if it had one as a sling. It only turned adult with it's last molt, before it still had some purple-ish colors, so it wasn't brown. And so far - about 6 months after the last molt - it's not brown either... ok, maybe a hint of brown. Anyway P. petersi is one of the smaller ones, but also one of the brownest. The other completely, utterly brown one is fortis. Vespertinus is brown, too. Nigricolor and antinous are both pretty big.