To me, it is heartless to kill the green iguanas (
Iguana iguana or
Iguana verdes) for any reason. They are now an "invasive species" (like humans) which is indeed problematic. The survival of other plants and animals that have become forage, habitat and prey for an invasive species is critical. But violent practices, just as with geese in NYC or starlings and goats in WA state, or pigs in HI, TX, or
MI are unacceptable. Collecting iguana eggs before harvest is one example of good conservation practices. Fining people who release pet iguanas is another. Amateur hunters traipsing through neighborhoods and jungles to seek and capture iguanas are as invasive and damaging to native flora and fauna as are the lizards.
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| "Native to Central and South America, iguanas arrived in Puerto Rico in the 1970s as part of the pet trade, says Rafael Joglar, a biology professor at the University of Puerto Rico who has studied the animals. Over time, he says, some escaped and others were set loose, and they slowly began to multiply." (citation) |
Green iguanas were introduced by "humankind" to
Puerto Rico as part of the pet trade and they multiplied. Lots of children and adults release their pet iguanas after they tire of them, much like people release bunnies and puppies. They also escape using their own intelligence. I know of an iguana who escaped in Bellingham WA. Because of iguanas free roaming in Puerto Rico, some members of humankind are now calling them "The Green Plague."
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| Herpestes javanicus photo from WikiMedia commons |
Habitat destruction and loose predators such as dogs and cats (and
mongooses - specifically
Herpestes javanicus - which are another species introduced by humans) endanger the
Iguana verdes as well as other species in the Iguanidae family such as
Iguana delicatissima. Hybridization with native iguanas is a problem. Moreover, the destructive pet trade is still going on.
The Wall Street Journal article:
RE: José Luis Monge, founder of Best Iguana Puerto Rico Meat: "In an industrial park east of San Juan, he is setting up a slaughterhouse he hopes will one day ship out 2,000 pounds of iguana meat a week."
From Amazon.com: "This beloved, bestselling guide has become a classic reference for anyone wishing to forge a spiritual connection with the majesty and mystery of the animal world."
From this article at the blog Repeating Islands, one can find many sources of information about the green iguanas of Puerto Rico.
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Scientists find that a spate of fence building is interrupting the migration of wolves, bears, and other animals and poses a long-term threat to their survival. 
"Slow Loris: So Cute, So Sad." See post with links to more info re despicable human beings and the torture, pain, suffering and death of another primate, the slow loris:
