J.? Myers 1974 Tryngita subroficollis 57 Tower grids, (118) region, Estancia Medelcan, 35 km S. of Trancas by road, Pto de Madariaga, facia de Bs. As. Agustina (2 November cont'd) Maneuver in which a middle bird was first chased by one, then another and finally spread out the middles 1000 - one group, 1009 - pr. of birds walking along in (0,0) of (16-) but + looks more as if a [illegible] bird is subtly keeping an intruder out of its territory, walking along the perimeter #1 [illegible] but #2 with other, which may be ten. [illegible] The outside bird was then supplanted by another. This latter then continued back to #1, and they engaged in a border fight -> the #3 chased #1, which ran with wings up and spread out, but #1 then started wing flushing and #3 returned toward head of territory. But #1 may not be ten (although I've seen good SS+ there). [reflection - return to the case of a spoiled flock which had landed off but near its previous foraging area - they approach forage direction to that forage area + then revert to static for ten discussion.] Then [reflection #2 - definite ten birds on the grid this morning but in some of the areas there is some doubt - (0,2) (0,1) (2,2) and (1,2) has solitary birds which are territorial, in (1,0) and (3,0), the density of traffic is higher + the confusion greater. Then are certainly some S-S tendencies, and periodically they are quite evident.] [reflection #3 - static flocks represent a foraging mode w definite space-specific foraging but not necessarily S-S aggression. This would produce default S-S A just as it does in fascicollis. But here this morning, the supplanted which are occurring are not purely non-S-S. I.e. they have SS affiliates.] Even still, the static mode is obviously different from the solitary territorial territory holders (which defend up to 625+ m², with pronounced borders, and nobody within 10-15m for most of the time.) 1023 - sandwhithing again in 16b. After the interaction began between the sandwichers I saw several low jabs, the beginning of a hopping fight where one bird crouches briefly after running and , also towards the belly of the other bird). In this posture, as the jab occurs, the tail + wings are together and they are elevated at a pronounced angle: