Starmom answered it: that's a split color egg two headed that matured. Dark blue is male.

As for collecting these guys, it goes right with the territory around here! Most of my wall art are puzzles I put together of fantasy scenes, an entire stuffed animal net is devoted to stuffed fantasy creatures (including my gargoyle), our mantle is covered with pewter and ceramic figurines of dragons, unicorns, castles... well you get the point.