The first couple of deer arrived in New Zealand halfway through the 19th century, when a lord of Essex sent them as a gift for the Southern island. The female died without offspring, shot by a hunter, leaving only the male deer. The same English noble sent a couple of females. After their arrival, the deer began to reproduce quickly, populating the forests of this southern country, multiplying. Towards 1930, the deer were so many, rewards were set on their heads, causing the killing of more than a million specimens in the following decades.
Conagua engineers report in 2012 a pack of these animals arrived in Lake Texcoco from New Zealand, in a new migration far removed from that initial one departing from English soil more than a century ago. In some documents, these animals appear as belonging to a pack that in 2005 shared grasslands with cows and native horses, in some spot of the Federal Enclosure. [...]