The tawny owl is Britains most familiar owl, breeding in woodland, parks, and gardens. Its welfare faces threats from road traffic, rat poison, and habitat change.
Key Facts
Tawny owls are the most common owl in the UK with approximately 50,000 breeding pairs
They are highly sedentary and rarely move more than a kilometre from natal territory
Road traffic is a leading cause of mortality for juvenile owls dispersing in autumn
Second-generation anticoagulant rodenticides accumulate in owl livers from eating poisoned prey
Nest boxes are readily adopted where natural tree cavities are scarce
Welfare Considerations
Tawny owl welfare is significantly threatened by secondary rodenticide poisoning. Second-generation anticoagulants accumulate in prey species and then in owls, causing internal haemorrhage and prolonged death. Studies show over 80% of tawny owls in UK surveys carry rodenticide residues. Road mortality is high for juvenile birds dispersing from natal territories who lack experience of traffic. Providing nest boxes in parks and gardens with mature trees supports breeding and reduces competition for scarce natural cavities.
What You Can Do
Never use second-generation anticoagulant rodenticides in your garden
Encourage neighbours and local councils to use rodent control methods that do not accumulate in owls
Install tawny owl nest boxes in mature garden and park trees
Drive carefully in autumn when inexperienced young owls are dispersing across roads