For The Ultimate Predator at AMNH, I made two Tyrannosaurs. Baby Bob is the name of the recently discovered 15 foot long, 4 year-old Tyrannosaurus Rex. Xiongguanlong, a 12 foot long tyrannosauroid, pre-dates T. rex by about 50 million years. Both of them are thought to have been feathered. I sculpted the head and appendages in clay, casting them in polyester and fiberglass. I welded sleeving steel armatures so that they can be broken down for travel, and coated them in spray insulation foam. After carving the musculature, I coated the bodies in more fiberglass and resin and continued with the detailing in epoxy. A specific, fine broom hair was chosen for the feathers and they were laboriously attached to the surface of the skin with a mixture of adhesives.
I made a 20ft long Mirounga leonina, or Elephant Seal for the Life At The Limits exhibit in 2015. Starting with a clay scale model, I used a 3D scanner to help me map out the steel armature and wooden gussets I would construct. Using chicken wire, foam, polyester resin, fiberglass, and epoxy, I fleshed out the body of the seal. The head was sculpted in clay and cast in polyester resin. The model comes apart for travel, and can be mounted on a post from the floor, or hung by two eye hooks on its back.
I created 2 male Citipati, a type of Oviraptorid from the Late Cretaceous period, for the Dinosaurs Among Us exhibit in 2016. I started by welding together some steel armatures, coating the armatures with foam, fiberglassing the surfaces and then coating with a texture I made by casting varying arrangements of turkey feathers.