Digitonthophagus gazella

(Fabricius, 1787)

Gazelle scarab, Brown dung beetle

Digitonthophagus gazella is a to Afro-Asian regions that has been widely across the Americas, Australia, and Pacific islands for of cattle . The exhibits rapid ability due to high reproductive rates, opportunistic resource utilization, and strong capacity. It has become established in numerous tropical and subtropical regions, with documented naturalized in North, Central, and South America. The species shows complex nesting involving tunnel construction by both sexes and has been extensively studied for its ecological impacts on native dung beetle .

Digitonthophagus gazella 001150-1 by Alandmanson. Used under a CC BY 4.0 license.

Digitonthophagus gazella 001206-3 by Alandmanson. Used under a CC BY-SA 4.0 license.

Digitonthophagus gazella - inat 54917277 by {{{name}}}. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Digitonthophagus gazella: //ˌdɪdʒɪtɒnˈθɒfəɡəs ɡəˈzɛlə//

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

Identification

Small to -sized with coloration. Distinguished from New World dung beetles by its Afro-Asian origin and established status across the Americas. The Digitonthophagus was elevated from subgenus status in 1959, though confusion persists with the outdated name Onthophagus gazella. Males and females both participate in nest construction, with measurable in body size and horn development. Introduced show significant phenotypic variation in size and shape compared to native African populations.

Images

Habitat

Open including pastures, grasslands, and agricultural landscapes. Strongly associated with cattle ranching systems. In its range, occupies savanna and grassland . Shows limited penetration into forested habitats; in northern Colombia, it was observed to remain outside of tropical dry forest boundaries. Prefers open, sun-exposed environments where mammalian accumulates.

Distribution

to Afro-Asian region including sub-Saharan Africa, India, Sri Lanka, and parts of the Middle East. to North America (first in 1972, now established in southern USA including Texas, Arizona, Florida, Colorado, Hawaii), Central America, South America (Brazil, Colombia, Bolivia, Chile, Peru, Venezuela, and others), Australia (introduced 1968), and Pacific islands (Fiji, New Caledonia, Vanuatu, Papua New Guinea). Climate modeling indicates it has largely reached its predicted maximum distribution in North America.

Seasonality

Activity patterns tied to rainfall and temperature. In arid northern Mexico, triggered by heavy thundershowers that reconstitute dried . In Brazilian Cerrado-Pantanal transition zone, abundance reduced by high humidity while temperature positively affects male abundance. Year-round activity in tropical regions; in temperate ranges, limited by and mortality.

Diet

Specialized coprophage feeding on mammalian , with strong preference for bovine dung. Does not utilize carrion, , or fruit. substantial quantities of cattle dung, burying portions for larval provisioning.

Life Cycle

with development period of approximately 31 days under laboratory conditions. Progresses through , three larval , , and . Both male and female participate in parental care through nest construction. Tunnel length and depth increase time-dependently during nesting period (measured at 14.7 cm, 16.9 cm, and 19.8 cm on days 10, 20, and 30; depths of 9.8 cm, 12.9 cm, and 13.5 cm respectively).

Behavior

Exhibits complex tunnel-making with time-dependent increases in tunnel dimensions. Both sexes participate in nest construction, indicating biparental care. activity to ultraviolet light sources observed. Shows aggregated spatial distribution around resources at low, , and high . Intraspecific likely driven by preferences toward repeatedly selected dung and patches with higher initial numbers. Exhibits differential rates that drive microspatial segregation from competing like Euoniticellus intermedius.

Ecological Role

Primary accelerating degradation of cattle dung on pastures. Reduces for and gastrointestinal of livestock. Provides economic benefits through reduced agrochemical use in cattle systems. potential alters structure; associated with lower abundance of endocoprid native in Brazilian pastures. Can outcompete similar species and potentially alter functions including . Considered naturalized with minimal impact in some regions where it does not penetrate forests or exclude native species through competition.

Human Relevance

deliberately across multiple continents for pasture improvement and . Part of Australian Project (1968) and similar programs in the Americas. Reduces cattle accumulation, breeding sites, and transmission. Subject of extensive research on invasion biology, bioclimatic modeling, and ecological impacts. Used in studies of modulation of . Toxicological research subject for effects on insects.

Similar Taxa

Onthophagus taurusBoth are in North America used for pasture improvement; O. taurus is European in origin and shows greater with potential for northern range expansion
Onthophagus nuchicornisEuropean established across Canada; used as positive control in comparative development studies with D. gazella
Euoniticellus intermediusAnother showing microspatial segregation with D. gazella through differential rates in shared