The Patterns of Bird Population Irruptions

 

“An irruption is the sudden change in the population density of an organism. In North American birds, irruptions often refer to the movement of northern-wintering species to the south in years of low food availability. You can recognize irruptive movement patterns at your feeders: some winters you may see a species at your feeders in great numbers, but in other winters they don’t show up at all.”

Explore FeederWatch data and tell us what you can find

Source: www.birds.cornell.edu

GR:  Here’s a volunteer citizen naturalist opportunity for everyone, but especially for those who love birds.

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