Global-invader
Guides
Cadra figulilella
raisin moth
Cadra figulilella, the raisin moth, is a globally distributed pest of dried and ripening fruits in the family Pyralidae. First identified as a pest of Muscat raisins in California in 1928, it has since spread to tropical and Mediterranean climates worldwide. The species is economically significant due to larval damage to dates, raisins, figs, and other fruits both on the tree and in storage. Adults are short-lived and nocturnal, with females laying an average of 160 eggs that hatch into larvae capable of causing up to 90% fruit infestation in severe cases.
Carcinus maenas
European green crab, green crab, shore crab, green shore crab, European shore crab
Carcinus maenas is a highly invasive littoral crab native to the northeast Atlantic Ocean and Baltic Sea. Listed among the world's 100 worst invasive alien species, it has established populations across temperate coastlines worldwide including North America, Australia, South America, and South Africa. The species exhibits remarkable phenotypic plasticity, with color morphs ranging from green to red that differ in aggression and stress tolerance. Its successful global dispersal occurs through multiple mechanisms including ballast water, ship hull fouling, and aquaculture transfers.
Pacifastacus leniusculus
Signal Crayfish
The signal crayfish is a large North American freshwater crayfish introduced to Europe in the 1960s to replace declining native fisheries. It has become one of the most ecologically impactful invasive decapods in Europe, outcompeting native crayfish and serving as a carrier of crayfish plague (Aphanomyces astaci). The species establishes self-sustaining populations rapidly, with six age cohorts documented within a few years of introduction. It shows sex- and size-specific coloration patterns, with males displaying more saturated and brighter ventral claw surfaces than females, suggesting a role in intraspecific communication.
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