Quote:
Originally Posted by Pondboy
No, former Park Ranger that appreciates nature in its pure form.
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Unfortunately people got starlings and house sparrows from Europe and let them go in the 1800’s in New York and San Francisco. They multiplied rapidly at the expense of our native birds like bluebirds. The effect between 1920 to 1950 was a 90% reduction in the population of bluebirds. Due to thousands of people putting up bluebird boxes the bluebird numbers came back up. The attention to providing bluebird boxes has been critical to their survival due to house finches and other competitors.