Everybody in the community that has expressed views on this issue agrees that Canada Geese, while nice to look at, have a huge issue with the large amounts of droppings. As a result, the board should look into ways of minimizing damage from geese in 2011.
I’ve explored the multiple ways that Geese can be deterred from pooping all over the park. It boils down to a few practical methods, and a whole host of non-practical methods. Fortunately, other jurisdictions in BC have been encountering the same issue with geese and I have been able to take some lessons learned from their experiences.
In particular, Okanagan jurisdictions have faced 100-fold increases in goose populations over the past decade, and have years of experience fighting the issue. A good summary is from the Osoyoos Lake Water Quality Society or Okanagan Valley Goose Management Program, although I have harvested many reports from other jurisdictions that essentially come to the same conclusion after many rounds of trial-and-error.
Practical methods:
1. Installing Barriers at the Lakeshore – An example would be growing tall grass at the lakeshore. While having the obvious advantage of being relatively easy to maintain, its primary disadvantage is it serves as a significant visual distraction. Also, this decision would fundamentally change the nature of the main beach area, which currently has sand.
2. Culling. A blunt way of describing this would be “shooting the geese”. A more politically correct terminology is called “wildlife management”. Periodic culling is proven to deter geese from staying around in an area. The obvious disadvantage is cost (you have to hire somebody to do it) and noise considerations. There is also the ethical/animal concern of killing wildlife in the name of park beautification. Indeed, such a decision would become very political. Finally, there is the issue of complying with surrounding legislation, such as the federal Migratory Birds Convention Act and/or the BC Wildlife Act.
Non-practical methods:
1. Windmills and other visual distractions – 2010 was a trial year for pinstripes, soft stakes, and other such methods in Cultus Lake Park, and this has proven to have little to no effect on geese.
2. Harassment – This method (e.g. hiring somebody to chase birds, or training dogs to doing so) is cost-prohibitive. Also, unless if the harassment is continuous (i.e. every 3 minutes or so), the geese become sensitized to the harassment and do not go away.
3. Encouraging nesting in other areas – While this sounds good in theory, unless if the prime geese spots in Cultus Lake Park are no longer considered prime by the geese, the geese will continue to populate the park even if there are other good areas available. In particular, the provincial park grounds have multiple prime locations, and this has not prevented flocks of geese from camping at Cultus Lake Park’s shores. Not helping the matter is people feeding the geese, which encourage them even further to stay around people.
4. Noise Generators – While these methods may be effective in orchids to scare away birds as the noise replicates the sound of shooting, it is unlikely that hearing the sound of this every two minutes, heard across the entire park boundary will be too popular. Essentially this is a decision that trades noise pollution for reducing the amount of goose poop on the ground. Finally, the geese do become sensitized to this method over time.
5. Stealing eggs from nests – Locating and finding nests is not a trivial issue; although this can be effective at slowing down reproduction rates, it will not reduce the existing population. Also, this can be dangerous for those that try it!
Some pictures (thanks go to JN for the pictures!):