Breakthrough School of Taxidermy Graduate Certificate

Hair slippage is caused by bacterial degradation of the hair follicle due to retained heat and moisture. A cold saltwater bath with bactericide rapidly cools the hide and halts bacterial action, whereas fleshing a slipping hide will pull the loose hair out, and oils or warm solutions will exacerbate the problem.

Waterfowl possess heavy fat deposits that, if left un-degreased, will slowly seep into the feathers, oxidizing and causing yellowing, clumping, and chemical degradation known as acid burn. Shrinkage, borax crystallization, and UV fading are unrelated to the specific issue of residual lipid oxidation in avian skins.

Altering the core length of a mannikin at the mid-section preserves the complex, pre-sculpted anatomical details of the shoulders and hips. Shaving the shoulders or hips destroys the musculature detail, and over-stretching a hide leads to unnatural tension, drumming, and eventual seam failure.

Pearl tipping relies on a highly diluted suspension of pearl powder in a clear carrier to achieve a translucent, reflective shimmer; too much powder creates an opaque, milky finish. Improper curing, high pressure, or mold release wax would cause adhesion failure, running, or fish-eye defects, not an overly opaque pigment layer.

The Migratory Bird Treaty Act strictly prohibits the possession, mounting, or sale of birds of prey (and their parts) by the general public without specialized federal permits, such as educational or scientific permits. Signing an affidavit, keeping it for a shop display, or attempting retroactive permitting for a private citizen does not circumvent these strict federal possession laws.

A highly acidic pickle (pH 1.0-2.0) is required to stop all bacterial action, plump the collagen fibers for shaving, and prepare the skin to accept the tanning agent. A pH above 3.0 allows bacteria to survive and cause hair slip, while alkaline solutions are used for neutralizing the acid later, not for the pickling stage.

Removing cartilage and using a properly pasted liner with edge epoxy ensures the ear dries thin, holds its shape, and prevents the skin from pulling away from the liner (drumming). Leaving cartilage causes shrinkage and bug infestation, clay makes the ear unnaturally thick and heavy, and using no paste with staples leads to drumming and visible mechanical marks.

To achieve a natural posture, the pivot point of the wing must match the actual anatomical shoulder joint of the bird. Anchoring wires at the chest center or neck creates an incorrect fulcrum point, resulting in wings that sit unnaturally high or low on the finished mount.

Two-part epoxies generate an exothermic reaction; pouring in thin layers prevents excessive heat buildup (which can crack the resin or melt the base) and allows trapped air to be easily removed with a heat source. Pouring a massive volume at once causes thermal runaway, and adding solvents like acetone destroys the chemical curing process.

In cervids, the anterior canthus naturally houses the tear duct and transitions into the preorbital gland, requiring a deep, downward-sloping tuck for realism. Building it up, covering the pupil, or stretching it flat ignores this distinct anatomical feature, resulting in a ‘bug-eyed’ or unnatural, surprised expression.

Reptile skins are delicate, and scales can easily slough off if subjected to harsh chemicals or extreme drying; a glycerin/alcohol mixture safely preserves the skin while keeping it pliable. Salting and sun-drying, boiling, or harsh tumbling will cause irreversible scale loss, shrinkage, and damage to the delicate epidermis.

Pinning fins to backing cards keeps them spread and flat during the drying phase, after which a flexible backing medium is applied to provide long-term structural integrity. Using auto body filler on wet fins ruins the texture, boiling destroys the tissue, and cutting off salvageable natural fins is generally avoided in high-quality skin mounts.

A tight baseball stitch from the flesh side pulls the edges together flatly and securely, and keeping hair out of the seam ensures the repair is completely hidden by the natural fur. Gluing the hair side ruins the fur, leaving it open creates a visible gap, and overlapping creates an unnatural, lumpy ridge on the mount.

Tanning the cape stabilizes it, and a dry-tan can be safely stored long-term; getting a deposit ensures you are paid for this initial labor, and a deadline prevents endless storage liabilities. Freezing raw hides indefinitely leads to freezer burn, refusing the intake loses a customer unnecessarily, and mounting/remounting is a massive waste of labor and materials.

The tail feathers (rectrices) are rooted in the fleshy tail block surrounding the pygostyle (the fused terminal vertebrae); preserving this block keeps the feathers naturally aligned and spaced. The furcula and sternum are in the chest, and the alula is on the wing, none of which are related to the tail structure.

Dry preservatives (like borax) merely desiccate the tissue and make it inhospitable to bugs and bacteria; they do not perform the chemical cross-linking of collagen that true tanning does. Therefore, the skin does not become true leather, lacks long-term stretch, shrinks heavily, and must be mounted while still damp and pliable.

Good composition balances the visual weight; if the subject projects action downward and to the left, anchoring the base on the right provides stability, while leading lines enhance the dynamic motion without making the piece feel like it is tipping over. Placing heavy habitat on the left makes the composition unbalanced and visually heavy on one side.

Splitting the lips—filleting open the inner lip skin and removing the thick meat and cartilage—is essential so the lips can be folded thin and pushed deeply into the mouth slot. If left thick, the bulk of the muscle prevents seating, and the skin will naturally pull out of the slot as it shrinks and dries.

The maximum girth dictates the primary circumference of the mannikin and is measured at the widest/deepest part of the fish, which is typically just anterior to the dorsal fin and behind the pectorals. The caudal peduncle is the narrowest part, and longitudinal measurements refer to length, not girth.

Polyurethane foams contain isocyanates, which are highly toxic respiratory sensitizers and skin irritants; proper ventilation, a chemical respirator, and chemical-resistant gloves (nitrile) are mandatory. The reaction is exothermic (produces heat) but does not emit radiation, spontaneously combust in air, and is absolutely not inert or safe to handle with simple cloth masks.