Tokyo – Miyajima, also known as the “shrine island,” is a popular destination in Japan. Located just a quick ferry ride away from downtown Hiroshima, this picturesque island is famous for its giant vermilion Shinto gate and sanctuary halls built over the waters of Hiroshima Bay. Despite having a small resident population of under 1,500, Miyajima attracts nearly 5 million tourists annually. However, one particular group of visitors, the great cormorants, has caused issues on the island.
The great cormorants, locally referred to as “the black gang,” have been causing problems for the locals. These diving birds have been flocking to Miyajima’s protected forests in large numbers, causing concern for two main reasons. Firstly, great cormorants are skilled fish eaters, diving up to 100 feet into the sea to hunt for prey. Their feeding habits have led to a significant decrease in fish populations around Miyajima, affecting the livelihood of local fishermen.
Secondly, the cormorants’ large colonies have resulted in extensive acidic guano deposits, damaging trees and vegetation on the island. The droppings have destroyed acres of forest, prompting efforts to deter the birds using non-lethal methods such as laser pointers, fireworks, and biodegradable bird deterrent tape. Despite these efforts, the city of Hatsukaichi plans to start hunting hundreds of cormorants at their breeding nests to manage their population.
While the cormorants are an important part of the ecosystem, their increasing numbers have led to environmental and economic challenges on Miyajima. It is essential to find a balance in managing their population to preserve the island’s natural beauty and resources.
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