Gryllotalpidae

Leach, 1815

Mole crickets

Genus Guides

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( ) are orthopterans distinguished by their cylindrical bodies and highly modified, shovel-like forelegs adapted for burrowing. typically measure 3–5 cm in length with small and reduced wings in some . The family includes both native and introduced species, with several species becoming significant agricultural pests in the southeastern United States after arriving from South America in the early 20th century. Mole crickets are primarily , spending most of their lives underground in self-constructed tunnel systems.

Neoscapteriscus vicinus by (c) Irvin Louque, some rights reserved (CC BY), uploaded by Irvin Louque. Used under a CC-BY license.Gryllotalpidae by (c) Irvin Louque, some rights reserved (CC BY), uploaded by Irvin Louque. Used under a CC-BY license.Gryllotalpidae by (c) Kim, Hyun-tae, some rights reserved (CC BY), uploaded by Kim, Hyun-tae. Used under a CC-BY license.

Pronunciation

How to pronounce Gryllotalpidae: /ˌɡrɪl.oʊˈtæl.pɪˌdiː/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

are immediately recognizable by their front legs: broad, flattened, and shovel-like with enlarged tibiae bearing stout teeth or dactyls for digging. The body is cylindrical and somewhat humpbacked, with small and short . identification often requires examination of the tibial dactyl arrangement— borellii (southern mole cricket) has widely separated tibial dactyls, while S. vicinus (tawny mole cricket) has dactyls close together. Wing length varies: some species are fully winged and capable of , while others are brachypterous or . Coloration ranges from pale brown to dark brown.

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Habitat

inhabit loose, sandy to loamy soils where their burrowing adaptations are most effective. They are found in diverse environments including coastal dunes, sand scrub, pastures, turfgrass, agricultural fields, and lawns. Native occupy natural grassland and riparian , while introduced pest species thrive in improved pastures of bermudagrass and bahiagrass. Soil moisture is critical—mole crickets require moist but not waterlogged conditions for tunnel construction and survival.

Distribution

The has a distribution with native across Europe, Asia, Africa, Australia, and the Americas. In North America, native (primarily Neocurtilla hexadactyla, northern mole cricket) occur in the eastern and central United States. Introduced species have established throughout the southeastern United States from Texas to North Carolina, with S. borellii extending west to New Mexico and S. vicinus spreading from the Gulf Coast northward. The European mole cricket (Gryllotalpa gryllotalpa) is native to Europe and western Asia.

Seasonality

exhibit seasonal activity patterns tied to temperature and moisture. In temperate regions, are active from spring through fall, with peak surface activity during warm, humid nights. In the southeastern United States, show bimodal adult activity: spring (April–May) and fall resurgence (August–October). Nymphs develop through summer, with some maturing to adults by fall. occurs as nymphs or adults depending on species and latitude. activity in winged species occurs primarily during dusk and early nighttime hours.

Diet

exhibit divergent feeding strategies among . The southern mole cricket ( borellii) is primarily , feeding on insects, earthworms, and other soil . The tawny mole cricket (S. vicinus) is herbivorous, feeding on living grass roots and shoots. The short-winged mole cricket (S. abbreviatus) is also herbivorous. Native northern mole crickets (Neocurtilla hexadactyla) are , consuming both plant material and invertebrates. Feeding damage in pastures results from root consumption, shoot damage, and tunneling that desiccates roots.

Life Cycle

undergo with , nymph, and stages. Eggs are deposited in underground chambers, typically 5–30 cm deep, in batches of 25–60 eggs. Incubation requires 2–3 weeks depending on soil temperature. Nymphs pass through 8–10 instars over 2–3 months, gradually assuming adult form and burrowing . Wing pads become visible in later instars. Adults live 2–4 months, with females producing 1–3 egg masses. time varies: some complete one generation annually in temperate regions, while subtropical may have overlapping generations.

Behavior

are and , constructing extensive tunnel systems 15–20 cm below the surface with occasional push-up mounds. They run rapidly when disturbed rather than jumping, and exhibit (playing dead) when handled. Males produce loud, chirping calls from specially constructed acoustic burrows to attract females; the calling song is -specific and amplified by the burrow's horn-shaped opening. occur in winged species under specific conditions of temperature, humidity, and , typically at dusk. Surface activity peaks during warm, humid nights after rainfall.

Ecological Role

function as engineers through their burrowing activity, which aerates soil and alters water infiltration patterns. As prey, they support diverse natural enemies including (Larra bicolor), tachinid flies (Euphasiopteryx depleta), and . Their role as pests in introduced ranges disrupts pasture and turf ecosystems, while native contribute to nutrient cycling and soil structure in natural grasslands. The variable feeding of different species ( vs. herbivorous) creates distinct trophic impacts.

Human Relevance

are significant agricultural pests in the southeastern United States, causing estimated millions of dollars in damage to pastures, turfgrass, and lawns. The tawny mole cricket ( vicinus) and southern mole cricket (S. borellii) are the most destructive, with the former feeding directly on roots and the latter destabilizing soil through tunneling. Management relies heavily on using introduced (Larra bicolor from South America) and (). Chemical control is limited by label restrictions in forage crops. Native rarely reach pest status.

Similar Taxa

  • Tridactylidae (pygmy mole crickets)Also possess enlarged forelegs, but are much smaller (<15 mm), have only three tarsal segments, and are associated with moist mud or sand near water rather than upland soils. Pygmy mole crickets are not agricultural pests.
  • Gryllidae (true crickets)Related orthopterans with similar body plan but lack forelegs; hind legs enlarged for jumping rather than forelegs modified for digging. True crickets are primarily surface-dwelling or arboreal.

Sources and further reading