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[[36 in circle]] No other species seems to be reacting to them particularly strongly. [[underline]] Anthus [[/underline]] may be uttering trills (CN trills?) or R's quite frequently. At least something is. There are at least 2 [[underline]] xanthocephala [[/underline]] with flock. One is [[juv?]] [[underline]] xanthocephala [[/underline]] j _____→ XXVIII. The [[underline]] labradorides [[/underline]] definitely tends to stay moderately low in shrubbery. Other [[underline]] Tangaras [[/underline]] usually or always higher. [[underline]] xanthocephalas [[/underline] ]usually approx. 15 - 20 ft above ground. XXVIII's in higher treetops, 25 - 30 ft above ground. The "BCBT" here is probably different species (XXIX). XXVII's do have black in wings. Not bars. There are probably 2 XXIX's with this group. One apparently chases the other, uttering long R in flight. XXIX(s) usually fairly low in shrubbery, like [[underline]] labradorides [[/underline]]. But seldom or never close to the latter. Still no trace BYB's around. Flock seems to have moved on a little (downhill) 8:30 am Starting to come back 8:50 But I have to leave myself April 1, 1963 In Tarma, Peru Worked above Tarma this morning, below Tarma this afternoon covering range approximately 10,700 - 9000 ft. No trace of mixed flocks or any special inter-species reactions involving species of my group(s). Species present include CC's, Bruns, [[underline]] Thraupis bonariensis [[/underline]] (common) an [[margin, in red]] CC Brun [[/margin]]