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[[circled]] 19 [[/circled]]

[[underlined]] viridis [[/underlined]] -type joined & followed [[underlined]] repeatedly. [[/underlined]] Then the group was joined 

[[left margin in green]] 28 [[/left margin]]

by a pair of [[two pencil, 2 blue, 2 green check marks]] [[circled in pencil]] 4 [[/circled]] [[underlined]] Basileuterus nigrocristatus. [[/underlined]] The [[underlined]] nigrocristatus [[/underlined]] also joined & followed repeatedly. At least one of the [[underlined]] nigrocristatus [[/underlined]] was very noisy throughout. Uttering lots of rattling songs. Then the group was 

[[left margin in green]] 29 [[/left margin]]

joined by a [[1 green, 1 pencil checkmark]] [[circled in pencil]] 5 [[/circled]] PL Atlapetes. At first this bird showed a definite tendency to follow the [[underlined]] nigrocristatus [[/underlined]] particularly closely. Followed repeatedly. Then tended to follow group as a whole. Repeatedly. Then joined the WM's!!! This PL was definitely single and quite silent throughout. Finally 

[left margin in red]] Cy [[/left margin]] [[left margin in green]] 30 [[/left margin]

a [[1 pencil, 1 green, 1 blue checkmark]] single Cy [[circled in pencil]] 6 [[/circled]] joined the group. Also silent. The WM Atlapetes were definitely the [[underlined]] leaders of the whole group  [[/underlined]] throughout this phase. The Cy only joined after the WM's had reached the highest point of their ascent in the group. But all the others joined while the WM's were still low and followed them up. By the time, the Cy joined, the WM's were becoming quiet. 

[[left margin in red]] Cy [[/left margin]]

The Cy itself was silent throughout. But the [[underlined]] nigrocristatus  [[/underlined]] remained noisy. About this time, the group started to break up. 

[[left margin in red]] Cy [[/left margin]]

The Cy flew away once, re-joined the group, and then disappeared again. The [[underlined]] nigrocristatus [[/underlined]] flew away from the group, re-joined it once, and then went off in one direction, low in bamboo & other second growth vegetation. I lost sight of the wren. This left the 2 WM Atlapetes and the 1 PL Atlapetes all alone 30 ft in a tree. Finally one WM flew off, then the other. Then the PL followed the WM's (definite). These three birds flew off in the same direction as the [[underlined]] nigrocristatus [[/underlined]] earlier. Following a course parallel to that of the warblers. About 10 ft away from the latter. Thru trees and tangles. I.E. it looked as if the leadership of the group might have passed from the WM's to the [[underlined]] B. nigrocristatus. [[/underlined]]

Part of this behavior, or the behavior of some of the birds involved, may have been "mobbing." Reaction to me. But the whole thing could no