This does not have anything to do particularly with glass. However, the US 2d Circuit Court of Appeals upheld the conviction of an internationally known falconer for importation of a black sparrowhawk (accipter melanoleucas) from South Africa. http://www.americanfalconry.com/blackspar.html
The falconer, Thomas Cullen, has or had a large collection of birds of prey, according to the decision. He sought to import three black sparrowhawks, with a commercial value of about $800 apiece in England, even though importation of the birds is illegal, because they are on the endangered species list. He tried to fit them in under an exemption for personal pets, but the lower court jury found that the filing with the government was false in this regard.
This may have been the first prosecution under this statute, which is codified at 16 U.S.C. 4901 et seq.
Decisions of interest - August 29, 2007 - http://www.bloglines.com/blog/PLL?id=6114