From voracious giant African snails to competitive exotic apple snails, these imported invasive slimers have made the Sunshine State their home.
have extended their ranges and colonized new ecosystems in multiple parts of the US. They also end up bringing extra company with them: parasites. Notorious for pathogens, species like the trumpet snail serve as vectors for the lung fluke, a flatworm thatand can sometimes be deadly to wildlife. Meanwhile, the giant African land snail carries roundworms, which can trigger intestinal issues.
The devastation wrought by these snails can be felt up the food chain, too. Non-native apple snails, for example, are outcompeting Florida apple snails, which are the primary food source for Everglade snail kites. This highly specialized bird of prey has been on thesince the 1960s, and has a relatively small population that is confined to southern Florida. The kite uses its unique hook-shaped beak to pry open snail shells, and has just started to crack into the larger invasive apple snails.
“There are lots of concerns about whether or not this non-native snail is going to further contribute to the decline of snail kites, and maybe push it to the brink of extinction,” says Fletcher. “[But] we have seen so far that this non-native highly invasive snail has essentially provided a Band-Aid for the snail kite.”
With the non-native apple snails increasing more rapidly than the native one, Fletcher says that his research team thinks it’s possible the invasive prey is “playing towards the increase in sort of the reversal of this population trend” in the snail kite—a glimmer of hope for the species. Everglades snail kites are adapted to feeding on local apple snails, but have since expanded to eating several exotic species.As the battle for holding the balance between native and nonnative species in Florida continues, another slimy creature may soon enter this picture and add to the damage. “The assassin snail could wipe out entire populations of Florida’s unique spring snails if introduced,” says Tolley-Jordan.
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