The egg addlers are back.
In an effort to control the Canada goose population in the Okanagan, a regional goose-management program is about to get back into gear.
Now in its ninth year, the egg-addling (or shaking) program helps prevent an increase in the non-migratory resident goose population of about 2,500 birds. The geese inhabit the valley year round and do not migrate.
Contractors have already been searching for pairs and nesting sites, and hope to complete the addling program by mid-May.
“Most communities along the valley struggle with management of non-migratory Canada geese,” said program co-ordinator Kate Hagmeier. “What many people fail to understand, and a large part of the message that we want to provide, is that the geese we are targeting are not native species to the area. These geese are largely descendants of geese that were translocated here as part of an introduction program in the 1960s and '70s. Young geese and eggs were brought here from different areas in Canada to encourage the creation of an Okanagan goose population.”
What was not foreseen was the inability of these geese to migrate because they had no natural parents to teach them, along with their ability to adapt and thrive to the mild Okanagan climate. The consequences have been a growing population with few natural controls and a need to manage that population.
The egg addling program involves shaking eggs or coating them with non-toxic biodegradable food-grade corn oil within 14 days of incubation to make them non-viable. The U.S. Humane Society supports the technique.
Once addled, eggs are returned to the nest. Geese continue to incubate until they realize the eggs will not hatch. At this point, it is generally too late in the year to produce more eggs. Adults are not harmed.
Key to the success of the program is finding new nests. The public is asked to report lone geese, pairs of geese, or nest locations on private or public land by emailing [email protected] or calling 1-877-943-3209. Information about the program is available at okanagangooseplan.com.
In addition to egg addling and population surveys, grants from the Western Canada Turfgrass Association in 2012 and 2014 contributed to a leg-banding program, which helps track bird movement patterns and lifespan.
“The data collected during the leg-banding program and addition of the second grant allows us to further improve our understanding of how the population is formed and where to target management strategies,” said Hagmeier.
The Okanagan Valley Goose Management Program is a partnership between the City of Kelowna, Central Okanagan Regional District, Regional District of Okanagan Similkameen, District of West Kelowna, City of Vernon, City of Penticton, District of Lake Country, Town of Osoyoos, Town of Oliver, District of Peachland, District of Summerland, Westbank First Nation, Glenmore Ellison Irrigation District and Western Canada Turfgrass Association.
During the past eight seasons, more than 10,000 eggs have been prevented from hatching through this minimally invasive approach. Taking into account natural mortality of young through predation or nest failure, that is equivalent to, at minimum, 7,500 fewer geese in the valley and all their potential young.