Thoreau writes in his journal:
The blossoms of the sweet-gale are now on fire over the brooks, contorted like caterpillars. The female flowers also out like the hazel, with more stigmas,—out at same time with the male. I first noticed my little mud turtles in the cellar out of their [sic], one of them, some eight days ago. I suspect those in the river begin to stir about that time? Antennaria probably yesterday, Skull-cap Meadow Ditch. Many yellow redpolls on the willows now. They jerk their tails constantly . . .