Great Backyard Bird Count, February 12–15

This 2014 video is called 17th Annual Great Backyard Bird Count.

From the Cornell Lab of Ornithology in the USA:

The 2016 Great Backyard Bird Count is February 12–15. GBBC was the first online citizen-science project to collect data on wild birds online and to display results in near real-time. Since it started 18 years ago, more than 100,000 people of all ages and walks of life have joined the 4-day count each February to create an annual snapshot of the winter distribution and abundance of birds.

In 2015, GBBC participants in more than 100 countries counted 5,090 species of birds on more than 147,000 checklists! See the full 2015 summary.

Preliminary results: here.