days after a cold front pushed spectacular numbers of monarchs
across west Texas, they cruised into northern Mexico, 200 miles
to the south. But this time, people saw "miles y miles
de mariposas monarcas" and said a "frente frio"
FIN LLEGARON!" they said.
"At last they are arriving!"
thanks to Rocío Treviño of Correo Real for forwarding
these spectacular observations from northern Mexico this week!
observations(in Spanish) >>
entering Mexico must go through customs. Monarchs can fly between
the countries without stopping!
Rio Grande River is the Border
Texas, the Rio Grande River marks the border between the U.S.
and Mexico. Above: As seen between Del Rio, Texas, and
the international bridge between Del Rio and Acuña, this
line on this sign declares the exact border between the United
States of Mexico and America.