No disrespect meant to the struck by lightning crowd or the lottery winners out there..We need to control their most logical upstream progress which is swimming as their downstream progress is absolutely impossible to control. It is more likely that people have moved fish as that is exactly what we have done, than birds. We trans locate (move and plant) millions of fish per year in Alberta. Birds lack the understanding or resources to do so,unless it is a flukey flop out from a pelican's bill-which is very unlikely as they generally don't eat and fly at the same time. A flop out would likely occur where they are feeding in the water. When seasonal flooding occurs throughout Alberta this is the most likely vector of transport upstream and should be of the most concern to the most people... A free for all to all fish who can make the swim. This would also be the most successful transfer as the fish are prepared for the trip on their terms. The second most likely would be the transfer of fish by people. Which logically is how this scenario began...true story actually. Millions of carp which are now feral due to their being introduced by people-not birds. The most logical,obvious and likely scenario is generally the closest to the truth..now what?
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