You are correct; birds are not sensitive to capsaicin [0]. Seems this is specifically confirmed for pigeons [1]. Perhaps the cinnamon or vinegar are the true r

You are correct; birds are not sensitive to capsaicin [0]. Seems this is specifically confirmed for pigeons [1]. Perhaps the cinnamon or vinegar are the true repellents? [0] https://pubmed.ncbi.nlm.nih.gov/11853675/ https://pubmed.ncbi.nlm.nih.gov/11853675/ [1] https://pubmed.ncbi.nlm.nih.gov/3797018/ https://pubmed.ncbi.nlm.nih.gov/3797018/