Comment: IRT Jonathan Maikui, it would be nice if we could have Zero Defects in everything we do, but that happens in make-believe worlds only. The primary concern should be to eliminate all rats on the island to prevent them from killing native wildlife.  It is unfortunate that a few fish and two birds may have died from the eradication effort, but I think that is a small price to pay for the better good that will come from a rat-free island.