U.S. Fish and Wildlife Roadblocks Sequencing of Black Rhino Due to NGO Lobbying
experiment.comIt wasn't due to NGO lobbying, and that's not currently in the source title.
https://experiment-uploads.s3.amazonaws.com/file-attachments...
Para 7 and 8 are pretty clear that Black Rhino is listed in Appendix 1 of CITES, and thus any import of material is subject to pretty fierce controls.