Great graphic by Nicolle Rager Fuller for the NSF. It accompanies a fascinating article about a researcher at the University of British Colombia who is studying bar-headed geese to understand how they can migrate over the Himalayas each year.
Why is it so good? Like the best graphics, you need not read the article to get the basic message: Bar-headed geese fly almost as high as Mt. Everest and commercial airliners. And it provides context galore: light aircraft, geese, ducks, and songbirds all fly significantly lower. The only other species that top Bar-headed geese in terms of height are some cranes and swans. So well done.