VALENTINE, Neb. — The Sandhills Prairie Refuge Association invites birders and nature enthusiasts to take part in the nation’s longest-running community science survey this week.

The annual Christmas Bird Count will take place near Valentine on Tuesday, Dec. 16, as part of the National Audubon Society’s nationwide survey. The count marks its 126th year overall, though the Valentine-area count is only several decades old.

Data collected during the Christmas Bird Count helps ornithologists track winter bird populations and long-term changes in species across North America. When combined with other surveys, such as the Breeding Bird Survey, the information provides insight into how bird populations have shifted over time and geography.

“If we had not had a Christmas Bird Count in those early years, we would not have as strong an understanding of long term bird trends. Many of these changes take place gradually.” Biologist Chan Robbins and creator of the North American Breeding Bird Survey said in a press release.

Participants will meet at 9 a.m. at the Fort Niobrara National Wildlife Refuge visitor center. From there, volunteers will break into small groups and cover assigned routes within a 15-mile-wide count circle, either on foot or by vehicle, identifying and counting every bird they observe.

Organizers say all ages and experience levels are welcome. Those new to birding can still participate by serving as recorders and learning along the way. Last year’s Valentine count documented eight species of raptors, including bald eagles.

Anyone interested in participating must arrange in advance with the count compiler. To sign up for the Valentine Christmas Bird Count, contact Katie Schober at (402) 376-3789 or by email at Katie_Schober@fws.gov.