The two tiny "bodies," displayed in cases, have three fingers on each hand and elongated heads.
Mexico president backs Jewish candidate after selection process row.
This woman had a distressing experience when her dog went missing under the airline's watch.
Two polls on Tuesday gave Sheinbaum a double-digit lead over her main rival for the MORENA candidacy, former foreign minister Marcelo Ebrard.
Neither the bus company nor Mexico's migration institute immediately responded to a request for comment.
It is the first discovery of its kind from the Phoenicopteridae flamingo family in the Americas and only the second in the world.
In 1942, the US Army gave 32 Hispano families on the Pajarito Plateau 48 hours to leave their homes so they could build the lab for atomic bomb construction.
Zeron, who Mexican officials say fled to Israel in 2020, has previously denied allegations of wrongdoing over the matter, one of Mexico's most notorious human rights scandals.
In response to criticism of his comments, Fox tweeted out rebuttals, calling Sheinbaum a “Bulgarian Jew” and Marcelo Ebrard, a former foreign minister also in the Morena party, a “French snob.”
The pair survived on raw fish and rain water after they were stranded a mid a nearly 6,000 kilometer journey from Mexico to French Polynesia.