Dung beetles are natural fertilizer machines. They break down animal manure and bury it underground, delivering nitrogen, phosphorus, and potassium directly into the root zone of your soil. You don’t train them or build them a habitat box. Instead, you manage your land in ways that attract and sustain a healthy beetle population, then let their biology do the work. Large-bodied dung beetles can enrich soil macronutrients by roughly 45% compared to dung left sitting on the surface.
How Dung Beetles Turn Manure Into Fertilizer
When livestock drop dung on a pasture, a fresh pat just sits on the surface. Rain washes some nutrients away, the sun bakes the rest into a hard crust, and the grass underneath dies. Without intervention, that pat decomposes at about 3.75 grams per day. With an active dung beetle population, decomposition nearly triples to around 10.73 grams per day.
The fertilizer effect comes from how beetles physically relocate dung. There are three functional groups, and each handles manure differently. Tunnelers dig vertical shafts beneath the pat and pack dung into underground chambers. Rollers carve off a ball of dung and roll it horizontally before burying it some distance away. Dwellers live and feed inside the pat itself, breaking it apart but not moving it underground. Tunnelers are the most effective at large-scale dung processing because they can bury substantial amounts of manure in just hours.
Once dung is packed underground, soil microbes break it down further, releasing plant-available nutrients. Research in tropical forest soils found that large-bodied beetles drove statistically significant increases in all four major soil nutrients: carbon, nitrogen, phosphorus, and potassium. The strongest effect was on potassium, with beetle-treated soil showing levels over 118 units higher than untreated controls. Phosphorus and nitrogen followed the same pattern, though smaller beetles contributed meaningful gains in potassium and phosphorus even without significantly moving nitrogen.
Soil Improvements Beyond Nutrients
The tunnels beetles dig act as a secondary fertilizer delivery system. Shafts range from 1 to 50 millimeters wide and create networks of pores that change the physical structure of your soil. In field experiments, soil bulk density in the top 10 centimeters dropped significantly within 48 hours of beetle activity, and that improvement persisted for at least six months. Lower bulk density means looser, more porous soil where roots can spread more easily.
Water infiltration also improves. The tunnel network channels rainfall downward instead of letting it run off the surface, and soil moisture increased not just in the top layer but at depths of 20 and 30 centimeters over a six-month period. For anyone trying to build soil fertility, this matters as much as the nutrients themselves. Fertilizer that washes away in a rainstorm is wasted. Beetle tunnels help keep both water and dissolved nutrients in the root zone where plants can use them.
How to Attract and Sustain Dung Beetles
You don’t buy dung beetles at a garden center. Native species are already present in most regions with livestock, and your job is to create conditions that let their populations thrive. Research from South Dakota State University found that pastures managed with regenerative practices (high stock density, frequent rotation, and no chemical pesticides) had significantly more individual beetles and a greater variety of species than conventionally managed land.
Rotational grazing is the single most effective tool. Moving animals through paddocks on a frequent schedule concentrates fresh dung in one area at a time, giving beetles a reliable food source. It also allows paddocks to rest, which lets beetle larvae develop undisturbed underground. Continuous grazing, by contrast, spreads dung thinly and exposes beetle habitat to constant trampling.
The size of your beetle population matters for results. Larger-bodied species drive the biggest nutrient gains, and diverse communities that include both tunnelers and rollers process dung more completely than any single species alone. Higher stock density during short grazing windows tends to produce the concentrated dung deposits that attract the most beetles.
Avoid Killing Your Beetles With Dewormers
This is the step most livestock owners get wrong. Ivermectin and related macrocyclic lactone dewormers (including doramectin, eprinomectin, and abamectin) pass through the animal’s gut and remain active in the dung. Field trials in Ethiopia found that no distinct dung beetle species were identified on ivermectin-treated dung, and beetle biomass declined significantly throughout the study period. A single standard dose can cause beetle mortality in fresh dung for weeks after treatment.
If you’re trying to build a beetle-driven fertilizer system, treating adult cattle with these compounds undermines the entire process. Research on the UK cattle industry estimated that unnecessary deworming of adult cattle costs the industry £6.2 million per year in lost beetle ecosystem services alone, on top of the cost of the drugs themselves. Adult cattle in good condition on well-managed pasture often don’t need routine deworming at all. When treatment is necessary, benzimidazole-class dewormers (such as fenbendazole and albendazole) are generally considered less harmful to dung beetle populations than macrocyclic lactones, though timing treatment to avoid peak beetle activity still helps.
What This Is Worth in Practice
The economic value of dung beetles goes well beyond fertilizer. A comprehensive analysis of the UK cattle industry estimated that dung beetles save farmers roughly £367 million per year through a combination of nutrient cycling, pest fly reduction, parasite control, and reduced pasture fouling. That works out to about £37 to £43 per cow annually, with organic systems seeing slightly higher per-animal benefits because they rely more heavily on natural processes.
Dung beetles also reduce greenhouse gas emissions from manure. At the level of individual dung pats, beetle activity cuts methane output by about 14.5%, which translates to a 7% reduction in total greenhouse gas equivalents over the 59-day life of a pat. Scaled up to the pasture level, reductions reached 12%. The methane savings are strongest in the first 20 days after dung is deposited, precisely when beetle activity is highest.
Species That Do the Heavy Lifting
If you’re in Australia or the southern United States, your pastures likely already host some of the world’s most effective dung-burying species. A total of 39 dung beetle species have been deliberately introduced into Australia, New Zealand, and the US since the late 1960s to manage livestock waste. Four have proven especially successful.
- Onthophagus taurus: A tunneler originally from southern Europe, now the most abundant exotic species in parts of Australia and widespread across the eastern and western US. It’s a medium-sized beetle that works fast in temperate climates.
- Digitonthophagus gazella: Native to Africa and Asia, introduced to Australia in 1968 and later redistributed to Hawaii and the US mainland. Prized for its efficiency at burying dung in hot, dry conditions.
- Euoniticellus intermedius: An African species introduced to Australia in 1971 and later to California, Texas, and Georgia. One of the fastest to establish and spread after release.
In cooler or more northern climates, native species do most of the work. The key isn’t selecting a particular species but creating the habitat conditions (fresh dung, undisturbed soil, no chemical contamination) that let whichever species are present build large populations. More beetles, and especially more large-bodied beetles, means more nutrients pushed into your soil.