Oneflewover
Landlord.
I think that the guts of mammals break down the seed meaning they will not germinate; the plants don't 'want' mammals to eat the fruit. The guts of birds on the other hand deliver a ready to germinate seed together with a lovely little dollop of fertiliser; I believe that birds aren't affected by capsaicinYou'd have thought the plants aim was to get it's fruit eaten and then pass through the bowel and get spread far and wide.
Maybe the higher level of capsaicin make this whole process a little quicker!