32 BIRDS IN THE ARBORETUM 
Grosbeak,’ Thrasher, Oriole, Bluebird, Wood Pewee, Indigo 
Bird, Redstart and several Warblers. These as yet show few 
signs of diminution. The Ruffed Grouse still persists, and 
the flock of Quails well maintains its numbers from year to 
year. The Mongolian Pheasant, a recent introduction, is ap- 
parently increasing. In the latter part of summer the little 
ponds are frequently visited by the Green Heron, the Night 
Heron and sometimes even by the Great Blue Heron, and 
several species of wild ducks occasionally alight for a short 
stay. 
Of the rarer birds of eastern Massachusetts the Yellow- 
breasted Chat and Brewster’s Warbler have nested here for 
two or three successive seasons, and a pair of Carolina Wrens 
took up their abode near the Administration Building for 
several weeks during the latter part of a recent summer. 
The abundance of Flowering Crabs, Barberries and other 
shrubs holding their fruit through the winter makes the Ar- 
boretum a favorite resort for both winter residents and visi- 
tants. For several years a Mockingbird has been present 
almost every winter, feeding mostly on the fruit of the Chi- 
nese Flowering Crab, and disappearing as spring advanced. 
The Song Sparrow and Tree Sparrow winter in abundance, 
and the White-throated Sparrow and M ‘le Warbler spar- 
ingly. The Butcherbird is unfailing. In uhose winters when 
the northern birds visit this region the Arboretum offers them 
peculiar attractions. The Pine Grosbeaks and Crossbills find 
a rich feast in the fruit of the Crabs, Barberries and Vibur- 
nums. The Birches afford abundant food for the Redpolls, 
and the Hemlocks for the Siskins. Flocks of Snow Buntings 
appear occasionally, driven in from the coast by easterly 
storms to stay only for a few days. In the spring flocks of 
