The Book of the Week is “Rat Island” by William Stolzenburg, published in 2011. This series of anecdotes described what frequently happens when some humans observe that a particular species is in danger, and with the best of intentions, attempt to counteract the perceived adverse effects of the situation.
Such campaigns have been repeated for centuries, always with unintended consequences and mixed results. For, the people involved have impure motives, and the manipulation of nature over the course of decades inevitably results in a “pox on everyone’s house.”
In the 1800’s, for instance, explorers introduced cats to eliminate an excess of rats in Oceania. Unsurprisingly, the food chain was disrupted, and the rabbit population increased. Rabbits killed the sheep in New Zealand, upsetting the people there. The latter took action by bringing in ferrets, weasels and stoats. The duck and parrot numbers were negatively affected.
Sometimes people are the predators. Other causes of the near-extinction of a species include statistically unusual weather, oil spills or disease. In New Zealand, people almost eliminated green parrots, poaching and smuggling them for their looks.
In another instance, the kakapo (another bird) was endangered by other animals. In the mid-1890’s, some sympathetic New Zealanders therefore sequestered the birds on an isolated island so they could multiply in peace. However, weasels found their way into the protected habitat, anyway.
Some tools of the trade among supposed “friends” of the environment who are only trying to prevent extinctions, include: poison, guns, traps, hunting dogs, and ammunition shot from helicopters. And on at least one occasion: hormonally-juiced Judas pigs that led to a spike in the number of eagles and drop in foxes on one island. Moreover, there are people who derive pleasure from cruelty to animals in the name of saving endangered species.
Read the book to learn of the checkered fortunes of the birds of the Aleutian Islands and Anacapa Island, the wildlife around Bering Island and other regions, and the constant tug-of-war among government agencies (such as Fish and Wildlife) responsible for those regions, conservationists and animal-rights activists.