Which came first, the taptaptaptaptaptapataptapataptap or the bread?

In the pantheon of great paradoxes, this is right up there with Xeno's brain-teaser about Achilles and the tortoise.* Is this a Welshman who trained a seagull to do a little dance (something birds do to mimic the sound of rainfall on the dirt, which tricks earthworms into surfacing to avoid drowning), or a seagull who figured out that if he dances near this easily-trained Welshman, he'll get bread instead of worms?

The important thing is, it was filmed. In vertical, yes... but it was filmed.

Sources: MrTomostan