26/06/2018
"Cayman Snow" as many of us call it are actually the Great Southern White butterflies.
An explosion in the population of white butterflies in parts of Grand Cayman is providing a stunning display of nature.
On Manse Road in Bodden Town and in parts of Prospect, thousands of small white wings filled the air last weekend. They could be seen hovering over various types of plants and fluttering away in bursts at the first sign of any disturbance.
Cayman Islands native plant and butterfly expert Ann Stafford said sometimes during the year, the islands get a lot of these Great Southern White butterflies, which hail primarily from Florida, the southern U.S. East Coast and the Gulf of Mexico. One of some 50 species of butterflies found in the Cayman Islands, the species is currently very prevalent here, according to Ms. Stafford.
“They’re not going to eat anybody’s garden plants, unless you have a particular shrubbery called ‘Bloody Head – Raw Bones’ in your garden. The butterflies adore it,” Ms. Stafford said. It is one plant she grows specifically in her garden to entice butterflies, she said. To identify the butterflies and their plant source, Ms. Stafford made a special trip to Manse Road Monday evening.
“The reason you have so much butterflies in this area is because there is lots of larval food plants: Bloody Head – Raw Bones,” she said. “Southern White butterflies also love to feed on the nectar of several common plants that grow wild and in gardens on Grand Cayman.”
According to Ms. Stafford, the Great Southern White butterfly, Ascia monuste, has several larval food plants in Cayman, such as headache bush, jasmine and nectar plants, and this could be one of the causes for the growing population of the butterflies locally. A lot of the butterflies are also migratory, she said.
The butterflies have a specific larval food plant, where the adult butterfly lays her eggs and on which the caterpillars feed when they hatch. The Great Southern White butterfly sometimes has large population outbreaks that spread throughout its range – the southern United States, through Central America and the Caribbean, into South America as far south as Patagonia, according to Ms. Stafford.
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