Wednesday, December 14, 2011

Front Range Geese

Lying at the western edge of the Central Flyway, the Front Range of Colorado has always been an important rest stop for migrating Canada geese. Before human habitation, the wetland corridors of the South Platte and Arkansas Rivers attracted these migrants on their journeys between Canadian breeding grounds and wintering areas to our south.

Irrigated croplands and man-made reservoirs were the first developments to alter this pattern, encouraging some of the migrants to settle in for the winter; after all, contrary to popular perception, winters are relatively mild along the Front Range, the product of abundant sunshine, dry air and frequent chinooks. As the human population of the urban corridor exploded over the past several decades, many more lakes, reservoirs, parks and golf courses have made the region even more appealing to Canada geese and some never bothered to return to their homeland. Today, it is estimated that 150,000 Canada geese are permanent residents of the Colorado Front Range and their numbers triple during the colder months when winter migrants arrive.

Human development of the Front Range corridor has clearly impacted the "natural range" of Canada geese and efforts to reverse that pattern are not likely to be successful. Facing few predators (coyotes, fox, human hunters) their attraction to this man-altered environment is sure to make them honorary natives of Colorado. While many humans despise their messy lifestyle, most of us enjoy watching their majestic flights and admire their hardy independence. Perhaps, a century from now, they will be known as Colorado geese, some of which might migrate to Canada for the summer months.