christmas bird count

This year marks the 125th anniversary of the nationwide Christmas Bird Count. The data volunteers gather in Utah helps scientists understand how climate change and other factors threaten bird habitats.

Data collected during the annual Christmas Bird Count helps scientists identify long-term trends about different species.

Tracy Aviary's Cooper Farr is standing in front of Liberty Park pond. It's mostly empty and only a few birds are hanging out, but Farr, a conservation…