sustained effort seen since No. 5 was built, and one which seemed to be actuated by a definite purpose and not by a mere reflex coming into play at sight of a twig or on having had a satisfactory meal. On the other hand, however, it may be doubted whether there is actual intention to build at present. The selection of material was not systematic as evidenced by the fact that it consisted of fibre, large and small twigs and rootlets, whereas in actual serious nest construction, materials are selected in the order in which they are required. There is no doubt in my mind, however, that this episode at the least, illustrates an actual preliminary reconnaissance in selecting and testing prospective nest sites. Of course, it is very early in the season also, though spring, except by the calendar, is here. 1:45 P.M. (Temp. 69). A few minutes ago I left Greenie with a twig looking up at the site most favored this morning. Both birds had just been getting worms from me, B talking on my knee very earnestly, seeming to ask questyions which wound up with a long drawn-out, high-pitched w-e-e-e with rising inflection. Since I have been giving special attention to his intimate communications,it will be seen that they are, so far, practically never twice the same in their entirety; again emphasising the versatility of these birds in use of the voice. Wren gets mate? (During the last two or three days, the wren has occasionally had a companion near him). Jan. 26th. B more disturbed At 8:30 A.M. Greenie was first to appear in the glade, making the chew call. Next came the wren, and several minutes after, Brownie. A strong north wind was roaring through the pines. This seemed to disturb B more than it did G, since the latter came for worms at once, while B watched from the bushes repeating over and over again a sort of rattling phrase deep in his throat. When he finally did come,