. Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds . ^ represented by the yellowl)ear {Diacrisia virginica) and thewoolly bear (^Isia isabeJJa)^ are notchosen as food by manv birds. Still,I have never known either of thesespecies to be very abundant, andthink it not improl)able that their comparative scarcity maybe largely due to their being eaten when very small by earlier Thrushestake some of theselarvae that winte
. Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds . ^ represented by the yellowl)ear {Diacrisia virginica) and thewoolly bear (^Isia isabeJJa)^ are notchosen as food by manv birds. Still,I have never known either of thesespecies to be very abundant, andthink it not improl)able that their comparative scarcity maybe largely due to their being eaten when very small by earlier Thrushestake some of theselarvae that winterupon the these cater-pillars ever becomevery abundant at anytime, it seems probable that other 1)irds would attack tussock moth caterpillars {Hemerocampa leucostigma)and others, which Dr. Packard instances as probal)ly immunefrom the attacks of birds, are eaten by a goodly number;and I have no doubt that the exemption of our trees in the. Fig. 38. —Thr wixoaterpilUtr. il\- bt-ar
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