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Back to crest of road 4:25 pm. Fog in patches here now. 
[[margin, in green]] 145 [[/margin]]
See pair of Blue [[two green check marks]] [[insert, in purple]] 1 [[/insert]] & Blacks feeding on small berries in trees one side of road 6-15 ft up. There the Blue & Blacks fly across road; j -------> mixed flock.
[[margin, in green]] 149 [[/margin]]
[[margin, in red]] Cy [[/margin]]
Latter includes 1 [[green check mark]] [[insert, in purple]] 2 [[/insert]] rufinucha, 1 [[green check mark]] [[insert, in purple]] 3 [[/insert]] Yellow face, 1 [[green check mark]] [[insert, in purple]] 4 [[/insert]] Cy, 1 [[green check mark]] [[insert, in purple]] 5 [[/insert]] [[underline]] H atro pileus. [[/underline]]All ranging quite low in second growth scrub, 1-10 ft up. [[underline]] Cy averaging particularly low. [[/underline]] Blue & Blacks land in small tree 15 ft up. Group probably also includes some tanager types in taller trees further away; but I can't identify them. Group as a whole very quiet; but also very coherent- moves off into forest quite rapidly.
     It is my impression that "CN"s are less common today, when fog is relatively light and patchy-y, than they were a few days ago, in the same place and at the same time, when fog was thicker. [[underline]] Presumably birds are relying on visual contact rather than auditory now.[[/underline]] I.E. [[underline]] they don't vocalize any more than they "have to". This, in turn, would suggest that the noise in noisy flocks is an unfortunate byproduct. [[/underline]] It may be useful, on the whole, for a bird to vocalize; and vocalization may be provoked by companions in flocks; but, [[underline]] in flocks [[/underline]], the vocalizations [[underline]] probably are not always useful. [[/underline]]
     Certainly, it does not seem to be true that mixed flocks are noisier, on the average, during the breeding season of most of the constituent species, than during the non-breeding season.
     A few minutes later, and a few yards down road, see another single Sooty Thrush alone.
[[margin, in purple]] XVI HO [[/margin]]     
5:07 pm. Much further down road. Come across another mixed flock in region of young, thick but low, second growth. Group includes 
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at least 1 [[green check mark]] [[insert, in purple]] 1 [[underline]] rufinucha [[/underline]], 1 [[green check mark]] [[insert, in purple]] 2 [[/insert]] [[underline]] atropileus [[/underline]], 1 [[green check mark]] [[insert, in purple]] 3 [[/insert]] Yellow face, 1 [[green check mark]] [[insert, in purple]] 4 [[/insert] tree-creeper, [[insert, in purple]] 5 6 [[/insert]] [[[three green check marks]] others. All birds seen ranging 5-10 ft up. Group quiet but coherent. [[underline]] rufin [[/underline]]