Chorthippus antecessor
Overview
Chorthippus antecessor is a critically endangered grasshopper species belonging to the family Acrididae, representing one of Europe's most threatened orthopteran insects. This small to medium-sized grasshopper displays the characteristic features of its genus, with robust hind legs adapted for jumping and relatively short antennae. Males typically measure 15-20mm in length while females are slightly larger at 18-25mm, exhibiting the sexual dimorphism common in acridid grasshoppers.
The species displays mottled brown and green coloration that provides effective camouflage among grasses and low vegetation. Endemic to specific regions of the Iberian Peninsula, this grasshopper inhabits dry grasslands and scrubland areas characterized by sparse vegetation and well-drained soils. The species shows a preference for areas with a mosaic of bare ground and scattered grasses, particularly in locations with specific microclimatic conditions.
Like other members of its genus, C. antecessor is primarily herbivorous, feeding on various grass species and occasionally on other low-growing plants. Adults are most active during the warmer months, with peak activity occurring in late summer when mating and egg-laying take place.
The species is classified as Critically Endangered by the IUCN, reflecting its extremely restricted range and declining population trend. Conservation efforts have begun to focus on habitat protection and restoration within its limited range, with some protected areas now specifically managing grassland habitats to benefit this and other threatened invertebrate species. Recent surveys have provided hope that targeted conservation measures may help stabilize remaining populations.
The primary threat to Chorthippus antecessor stems from habitat loss and degradation caused by agricultural intensification and urban development within its restricted Iberian range. Overgrazing by livestock has altered the delicate balance of vegetation structure that this species requires, eliminating the sparse grassland mosaic essential for its survival. Climate change poses an additional threat through increased drought frequency and temperature extremes, which can disrupt the species' reproductive cycle and reduce the availability of suitable host plants.
Habitat
Chorthippus antecessor inhabits dry Mediterranean grasslands and scrubland areas with sparse vegetation cover and well-drained soils. The species requires a specific mosaic of bare ground interspersed with scattered grasses and low shrubs, typically found in areas with particular microclimatic conditions within its restricted Iberian Peninsula range.
