Ultimately, the food availability and the conditions that the birds receive when they come back to Canada are going to be dependent on a great number of factors, as the commissioner has said, and it is possible that climate change and the timing of migratory return could affect food availability. We are looking at that, but for the moment they remain hypotheses, and they are currently the subject of a number of studies, including the points you raise, but we don't have definitive answers right now.
We are hopeful that we'll have those in the coming years, but we're dealing with a situation that is already inherently terribly variable, so every year is very different from the last and very different from the subsequent. We know this in wetlands, for instance. It becomes very challenging to detect a signal against all of this variability, and it takes quite a while and quite a bit of data to understand what the true trend is underlying what is naturally an incredibly variable situation.