My partner and I have been searching for a new house recently. It is considered a “seller’s” market here, and houses that are listed in the morning are off the market by the evening. It is frustrating how fast houses sell, but at least we are in a good place where we don’t need to move immediately. However, what about when your home has been destroyed or it has disappeared? With all of the wildfires across the country this year, this is unfortunately a question some people have to deal with.
Thinking about this made me wonder how do the birds do it?! Most seabirds are philopatric, meaning they tend to return to their nesting site year after year for breeding. Where do they go if they can’t return to that same nesting site? For instance, during the 2010-2011 winter, massive storms hit the islands in Haida Gwaii, BC. One island in particular, Reef Island, normally supports thousands of ancient murrelet breeding pairs (about half of the world’s population).
In the summer of 2011, the field team and I packed our bags for our week trip on Reef Island. We knew about the storms during the winter that had destroyed the entire camp but we did not know the extent to which it would affect the ancient murrelet population. As the island came into sight through the fog, we could see that giant Sitka spruce and massive red cedars that once stood tall now lay every which way fallen on the forest floor. This was not a promising sight for nesting seabirds.
Following transects that had been followed for years for population estimates lead us to find nest boxes that once supplemented the natural nests in this colony were now either crushed under the fallen brush or scattered around the forest at random. Sadly, we were only able to find one nesting ancient murrelet.
But weirdly enough, despite the loss of suitable habitat at the most popular nesting site on Reef Island, the global population of ancient murrelets was not declining. Where were these suddenly homeless breeding pairs going?
The logical answer is to assume they searched for a new home. But previous surveys in the area suggested that most nest sites were already occupied. So did they settle for nesting sites that were less desirable? Without knowing about the storm in advance (I think being able to accurately predict the weather is every field biologist’s wish), and pre-emptively equipping the birds with tracking devices, it is difficult to know where the birds went. The stable population suggests they figured something out! Perhaps some started to nest in ferries like the pigeon guillemot pair I spotted.
A similar situation happened to me with finding a job after my master’s degree. Jobs related with fieldwork were no where to be found but I thought I would try a lab job instead. When I first started as a research assistant in a lab I thought I was choosing a working site that was less desirable (how would I ever survive working without constant fresh air!?). Now I am surrounded by the beeps and hums of machines rather than the birds chirping up above and wind whistling though the trees. It turns out that I love my job but one thing is still true – I may have acquired a lab coat but I will never give up my fieldwork uniform of a plaid shirt and hiking boots.