Showing posts with label ants. Show all posts
Showing posts with label ants. Show all posts

10 April 2014

A Game of Thrones: Butterfly Larvae Pretends To Be Queen Ant To Survive



The Maculinea butterfly larvae are parasites of red ants. It is brought into the nest by the ants thinking it is one of its own. Once in, the caterpillar is fed and protected by these red ants.

The Maculinea caterpillar was found to mimic acoustic signals emitted by the queen ant to fool worker ants into being adopted, protected, and cared for by the ant colony.

A group of researchers from the University of Turin in Italy released a paper on this behavior in the open access journal PLOS ONE.

14 February 2014

Crazy Ants Displace Fire Ants As Dominant Invasive Species


According to a University of Texas study, Crazy Ants may become the dominant invasive ant species displacing Fire Ants in the near future.

The ants secrete a compound that neutralizes the venom used by Fire ants. The venom of the fire ant is very powerful and even fatal. It is two to three times as toxic as DDT on a per weight basis. But because crazy ants have a natural defense against the venom and their sheer numbers, they can overcome the species in a head to head confrontation.

Crazy ants gained attention when Texas exterminator Tom Raspberry noticed these ants in a Pasadena chemical plant in 2002. He noticed that the species seem to keep multiplying even after extermination.

The ant colonies seem to have an unexplained attraction to electrical devices. Crazy ants are known to damage devices such as televisions and laptops. The ants will stream inside the device until they form a single moving mass that completes a circuit and shorts it.

They take over an area through sheer numbers. These ants can overtake beehives and destroy the colonies. Bird chicks are smothered and struggle to hatch. In South America, where scientists now believe the ants originated, they have been known to obstruct the nasal cavities of chickens and asphyxiate the birds. They even swarm into cows’ eyes.

With their natural defense against fire ants, scientists believe that crazy ants will displace fire ants in the Southern United States.