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R [[circled page number 105]]
[[underline]] belcheri [[/underline]], Nov. 17, 1955, IV.

[[underline]] Agg V (looking very low-intensity) before attack [[/underline]] - [[underline]] then G during flying attack, just before the moment of impact [[/underline]] - when attacking a juv. [[underline]] belcheri [[/underline]]
Yes! These birds are definitely completely territorial.
One of the Squats I have seen could be called a Freeze
G during attack on Grey Gulls. This appears to be unritualized
Leaving 5:40

[[underline]] add note [[/underline]] Nov. 25, 1955
[[underline]] I don't remember ever hearing a Landing Call by a Belcher's Gull. [[/underline]]

Friday, Nov. 18,
1955, La Puntilla
[[underline]] cirrocephalus [[/underline]]

Same place as yesterday when a pair of Grey-headed Gulls
land. One is immature, the other is adult (perhaps 2nd year, completely adult, except for a few dark marks on tertials, which may be signs of youth)
There was a dispute between these two birds when they first landed; the adult did not care to be approached by the immature I didn't catch the best part of this dispute; but the following parts are certain Adult screamed long LCN notes, "Kaaaaa Kaaaaaa Kaaaaa.....", very buzzy or rasping, no [[image-wavy line]] effect, no twang. From O, which looked about as much like Hartlaub's Gull as anything. [[image-sketch of gull head]] A slight tendency for succeeding LCN's to get deeper in pitch; but there were never more than 3-4-(possibly) 5 of them; no real Long Call effect. This followed by [[underline]] silent [[/underline]] F, very short-necked. [[underline]] This F with R [[/underline]], (but R was possibly due to wind - although I rather doubt it).
The immature was silent during this dispute. Flew away. Landed. Later uttered 3 or 4 single LCN's. These were a trifle unexpected, [[underline]] a rather clear [[/underline]] "Kiow" sort of thing; i.e. more like the Laughing Gull LCN's than are the LCN's of the adult.
Notice that dark red ring around eye is quite conspicuous in adult Adds to the "staring", hypnotic, effect.
The usual Alert Posture is present