4 ms·
They all happen in urban areas though, which are a small fraction of the country (< 1/10 of the uk, whereas farmland is > 7/10. ). Hence, while they might be s
by ajb 3y ago
They all happen in urban areas though, which are a small fraction of the country (< 1/10 of the uk, whereas farmland is > 7/10. ). Hence, while they might be significant for whether you see any birds in your back garden, the problems on farmland are more likely to be significant for the bird population as a whole.
- croes 3y agoThere are many cats in rural areas, so they are a significant problem there too.
- ajb 3y agoOkay if you want to be precise, the mass of the density function of cats over uk locations is largely in urban areas, while the mass of the density function of bird-habitat-value is much more spread over the whole landscape, which is also true of agriculture. Risk to birds will be proportional to the dot-product of the bird-habitat-value density function with that of a risk factor, and since the density function of agriculture is much more correlated with that of bird-habitat-value than it is correlated with that of cats, so changes in agriculture are likely to be the greater factor in changes in bird population.