Crop Harvest Mortality: The Overlooked Welfare Cost of Plant Agriculture

Crop harvesting kills and injures large numbers of small animals including rodents, birds, and insects, a welfare cost often overlooked in comparisons of plant and animal diets.

Key Facts

Mechanical harvesting of crops kills field mice, rabbits, ground-nesting birds, and insects in large numbers
Estimates of field animal deaths per tonne of food vary widely from hundreds to thousands depending on crop and method
Steven Davis famously argued in 2003 that veganism might kill more small animals than an omnivorous diet — this claim has been substantially contested
Geoff Russell and others have argued the per-calorie animal death rate from crops is still much lower than from pasture livestock
Night harvesting can reduce bird deaths as most ground-nesting birds are less active
Precision harvesting technology has potential to reduce accidental wildlife mortality in crop fields

Welfare Considerations

Crop harvest mortality is a real welfare concern but its scale is often overstated by critics of plant-based diets. Careful analysis shows that per calorie of food produced, plant agriculture causes far fewer animal deaths than animal agriculture when full lifecycle effects are considered. Nonetheless, developing harvesting technologies that reduce field animal mortality is a genuine welfare improvement worth pursuing.

What You Can Do

Support research into precision harvesting technology that reduces field animal mortality
Engage honestly with the crop harvest mortality argument without dismissing or overstating it
Advocate for farming practice standards that minimise wildlife mortality during harvest operations
Support organic and wildlife-friendly farming certification schemes that consider field animal welfare
Recognise that reducing overall agricultural land use through dietary change benefits field animals as well as farmed animals