21.   It was an oddly beautiful day, the leaves still on the birch trees.

22.   My birch trees are being attacked and killed by sapsuckers.

23.   Modern diamond exploration involves everything from satellite photography and airborne magnetic detection to examining trace elements in the leaves of birch trees.

24.   Other photos show huge clumps of snowdrops mingling with a heady assortment of hellebores, crocuses, iris and aconite in a woods full of birch trees.

25.   Outside the small two-story house, birds twirled on a hanging feeder, and a grove of birch trees caught the afternoon light.

26.   Outside my second-story office window, the leaves of a birch tree living in a planter tap against the screen.

27.   Profilin was first identified as an allergen in birch trees and has since been found in latex and in a number of weed pollens, he said.

28.   Stands of birch trees, which flourish here only because these mountains were stripped of their harder woods nearly a century ago, glistened in the sun.

29.   The center of the dining room is anchored by a floor-to-ceiling fireplace surrounded by four faux birch trees.

30.   The combination of thermal sheeting, plate glass, aqua netting and birch trees is a vision out of a dream.