Cities may save some threatened species but not their ecological functions.

On the other hand, a GLM (with log-transformed detection distances as response variable, normal distribution and identity function) showed no differences between species (Wald κ 2 = 0.91, d f = 1, p = 0.327) nor an effect of flock size (Wald κ 2 = 1.48, d f = 1, p = 0.233), with a marginally significant effect of habitat (Wald κ 2 = 5.11, d f = 2, p = 0.078).

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