Cat
The domestic cat's credentials as a pest control agent are extensively documented and somewhat controversial. Studies estimate that cats kill between 1.3 and 4 billion birds and 6.3 to 22.3 billion mammals annually in the United States alone. This represents an astonishing capture rate, though conservationists note that much of this efficiency is deployed against species humans would prefer remained uncaptured.
Within domestic environments, cats demonstrate reliable mouse and rat suppression. The mere presence of a cat, through scent marking and territorial behaviour, creates deterrent effects measurable in reduced rodent activity. However, cats display marked inconsistency in targeting, showing equal enthusiasm for pest species and treasured garden birds.
Frog
Frogs operate pest control programmes of remarkable specificity and efficiency. A single frog consumes approximately 100 insects per night, targeting mosquitoes, flies, and agricultural pests with precision that would impress any integrated pest management consultant. This consumption occurs without collateral damage to vertebrate populations.
The economic value of amphibian pest control services has been estimated at billions of pounds annually across global agriculture. Frogs require no feeding, no veterinary care, and no litter boxes, operating instead as self-sustaining biological control agents wherever sufficient moisture permits their residence. Their targeting remains exclusively focused on invertebrate prey, eliminating the songbird casualties that complicate feline pest control claims.