Tag Archives: Gastropods

The Numbers Game #39

A sign in Hawaii Volcanoes National Park
A dramatic sign at Hawaii Volcanoes National Park.

The idea of The Numbers Game is to enter a number into the search bar of your computer and then post a selection of the photos that turn up. This week’s number is 160. Captions are on the photos. You can see more responses here.

Also, seven photos posted for Becky’s Squares: Seven. See more responses here.

The Numbers Game #23

A Giant African Land Snail on the move in Hawaii
A Giant African Land Snail moves forward with purpose, if not speed.

The idea of The Numbers Game is to enter a number into the search bar of your computer and then post a selection of the photos that turn up. This week’s number is 144. Captions are on the photos. You can see more responses here.

Also posted for Becky’s Squares: Move Forward, Reconstruct, Renew, and/or are Burgeoning. See more responses here.

Black Nerite Snails

Black Nerite Snails on the coast in Hawaii

Recently, I was sitting on a rock, preparing to get in the water. There were a lot of little black bumps on the rocks, which I’ve seen before, but never really paid attention to. Except, this time, I noticed some of the bumps were moving.

These bumps are Black Nerite Snails which live just above the waterline. They’re about half-an-inch long and graze on small plants that grow in that zone.

Alright, Mr. DeMille, I’m ready for my close-up.

The current Friendly Friday challenge theme is ‘Close ups and Macros.’ See more responses here. Here’s a selection of some little creatures up close and personal.

Giant African land snail dicing with death

I spotted this giant African land snail in the yard a few days ago, moving purposefully through the wet grass. Unfortunately, it was moving in a straight line toward one of my truck’s wheels. Since I was about to get into the truck and drive away, the snail was perilously close to getting smushed. Instead, I picked it up and moved it out of the way before driving off.

Given that the giant African land snail is an invasive species I should probably have just run it over. Next time maybe.

Rosy wolfsnail

Rosy Wolfsnail

The rosy wolfsnail (Euglandina rosea) is a voracious predator. It devours other snails and slugs, and because of this trait, it was introduced into Hawaii in 1955 to control the numbers of invasive African land snails. Unfortunately, the African land snail grows to a very large size and, when it gets that big, the rosy wolfsnail wants nothing to do with it.

Instead, the rosy wolfsnail took a liking to the much smaller indigenous snails and proceeded to wreak havoc on their numbers. It’s now on the International Union for Conservation of Nature’s list of the top 100 worst invasive alien species in the world.

Giant African land snail

Giant African Land Snail on the moveGiant African Land Snail and ants nest

This giant African land snail’s shell is about three inches long, but some adults grow a shell eight or more inches in length, with 7 to 9 whorls. Their size and attractive shells make these snails popular in the pet trade. In some places, the snails are used for food.

Thus endeth the positive news. On the downside, the giant African land snail is considered one of the world’s top 100 invasive species. Besides being a mighty muncher of fruits, vegetables and other vegetation, it carries pathogens damaging to a wide range of plants. It carries human pathogens, too. Oh, and it has a negative impact on native snails.

However, like most of us, it wanted no part of an ants nest, as seen in the photos in the middle and below.

Giant African Land Snail