Shipping the fluid

Dry specimens, where humidity is the problem

Updated October 2026

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Four of the eight leaves are dry Humidity is the enemy instead Pests are the second enemy Light is the third Mounting matters more than the jar Wide necks for solid objects And the legality questions do not go away References

No fluid, no flammable liquid, and an entirely different failure.

Four of the eight leaves are dry

Butterfly specimen, pressed botanical, herbarium sample and feather. The group’s constraint row calls all eight "preserved in fluid", which is a blanket default and wrong for these. Nothing is shipped as a hazardous material here.

Humidity is the enemy instead

Mold on a pressed plant, relaxing and distortion in a mounted insect, and feather damage all follow moisture. A sealed glass jar with a good liner is a genuinely effective answer, and a desiccant makes it a better one.

Pests are the second enemy

Dermestid beetles and clothes moths eat dry organic material, and a sealed jar excludes them mechanically. For a small collection that is simpler and safer than any chemical approach.

Light is the third

Pigments in wings, petals and feathers fade. The shelf offers 6 amber and 3 frosted containers against 19 clear, so there is a real choice between showing a specimen and protecting it.

Mounting matters more than the jar

A specimen loose in a jar abrades against the glass every time it is moved. Pinned, mounted on card, or held in place is what preserves it, and the jar is the case around that.

Wide necks for solid objects

You have to get the specimen in and out without touching the walls, which argues for the widest neck the design allows. 58-400 and 53-400 are the most common finishes here at 7 each, with 70-450G, 63-400 and 89-400 behind them.

And the legality questions do not go away

A feather is still a part under the MBTA whether it is wet or dry, and a pressed plant taken without authorization is still reachable under the Lacey Act. Dry only removes the shipping half.

References

16 U.S.C. 703, Taking, killing, or possessing migratory birds unlawful. Subsection (a) makes it unlawful to possess, offer for sale, sell, barter, purchase, ship, export or import any migratory bird, any part, nest or egg of such a bird, or any product composed in whole or part of them. Subsection (b) limits the subchapter to species native to the United States or its territories. law.cornell.edu

16 U.S.C. 3372, the Lacey Act’s prohibited acts. Paragraph (a)(1) makes it unlawful to import, export, transport, sell, receive, acquire or purchase any fish, wildlife or plant taken, possessed, transported or sold in violation of any law, treaty or regulation of the United States or any Indian tribal law; (a)(2) extends it to interstate or foreign commerce for State and foreign law violations. law.cornell.edu

Written from federal statute and regulation, not from a collection room. Wildlife law is federal, state and sometimes tribal at once, and the Lacey Act makes a state or foreign violation a federal matter. Nothing here is advice on a particular specimen, and the permit questions belong to the Fish and Wildlife Service.