The Patagonia picnic table effect (also known as the Patagonia rest area effect or Patagonia rest stop effect) is a phenomenon associated with birding in which an influx of birdwatchers following the discovery of a rare bird at a location results in the discovery of further rare birds at that location, and so on, with the end result being that the locality becomes well known for rare birds, even though in itself it may be little or no better than other similar localities.

The name arises from the Patagonia

Patagonia, Arizona

Patagonia is a town in Santa Cruz County, Arizona, United States. As of 2010 Patagonia had a population of 913. Patagonia was formerly a supply center for nearby mines and ranches. Currently, it is a tourist destination, retirement community and arts & crafts center. The Nature Conservancy's...

 Rest Stop in Arizona

Arizona

Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

, where the phenomenon was first noted.