A post from early November saved a similar video of starlings for the end. Twitchers (a nickname for seriously devoted birdwatchers) were expected to read to the end and see that video as a crescendo of beauty.
We do not have the metrics to determine how many may have done so, nor of course whether any given viewer was a twitcher. We do, however, know that birds have unintentionally become a major force on our site. We have a daily feature of amazing photographs of birds and a regular increase in the number of photographers contributing those, not to mention viewers visiting them.