This video, in Spanish is about the Sierra Gorda nature reserve in Mexico.
From the World Land Trust:
27 November, 2014 – 12:51
Although three weeks late, Monarch Butterflies have started to appear all over Sierra Gorda, stopping off on their long migration to the fir forests further south.
Roberto Pedraza, Technical Officer of Grupo Ecológico Sierra Gorda, World Land Trust’s (WLT) conservation partner in Mexico took this photograph on 22 November 2014.
Roberto found the big group of the butterflies in the highlands of Sierra Gorda. There were so many of them that the branches of the cedar were bowing under the weight.
He noticed that they had returned to the same place that he remembered them visiting when he was a child.
“When I was young, the oak branches bent under the weight of the butterflies. Now there is a cedar in the same spot, and the same oaks with some butterflies. Unfortunately they are nothing compared with their former numbers, but it’s amazing how they ‘remember’ their wintering grounds in central Mexico, and the good spots to have a nap and a rest during the long journey.”
Traditionally Monarch Butterflies arrive in Mexico on the Day of the Dead, which is celebrated on the first two days of November, and according to Mexican folklore they are said to represent the souls of the dead.