1983 R.L.Mumme 8 M. formicivorus Plague (20July) Avery interesting watch: ①♂660 is here with J889, both present throughout the watch. So it now seems quite a bit clearer that ♂660 "introduced" J889 to Plague. ② ♂521 fed J889 4 times, but never by any of the other birds, including his father, ♂660. In fact, ♀496 still has a moderate-strong dislike for J889. ♀496 chased the juvenile 9 times (at least) during the watch. ③ Saw a very strong, vigorous dominance interaction between ♂521 + J660. Much pecking by the former, much chatting by the latter. 21July Slow grany census, 1105-1305. Only ♀496 + ♂521, plus an intrusion by ♂787 of 1800. Plague not abandoned Fall 83. By spring '84 however, Plague contained only ♂521, as he chased helper ♂ and ♀496 away as acorn supplies dwindled.