Mourning doves are very abundant in my area and are a common site throughout most of the US. Here in the US, they are the number one hunted game bird. According to the Virginia Department of game and Inland Fisheries (VDIGF) there are nearly 30,000 dove hunters that take about 400,000 doves each year in Virginia. It sounds like a lot but several new dove management programs have been initiated in recent years to help refine harvest management strategies:
"Mourning dove populations are monitored through harvest surveys and breeding population surveys. One such survey, the Call Count Survey (CCS), includes more than 1,000 randomly selected survey routes throughout the U.S., and has been conducted each spring for the past 39 years. The information collected from this survey, which includes both the number of doves seen and heard, is used to monitor dove population trends over time."
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If you want to attracting mourning doves to your backyard offer them a variety of seed such as corn, sunflower or millet. They are primarily ground feeders but will also feed on a platform type birdfeeder.