Nice May morning; Yellowthroats singing loudly in the area and the back yard was invaded by a swarm of White-throated Sparrows for an hour or so. I estimate somewhere around a dozen, maybe more. They were mostly in the (tall) grass greedily scarfing up the Dandelion seeds which were available in profusion. It was amusing watching them hop, sometimes quite high, to snag a seed-head and tear a few seeds out. The image of the green yard with lots of scattered brown movement was very unusual. It seemed to disturb the Catbirds a little, as the pair of them kept flying back and forth from the trees on one side of the yard to the other. Now that the sparrows are gone, things have calmed down again, and the Catbirds seem much more relaxed.