solitary male
サル話の続き。今回の襲撃は群れから離れた「はぐれ個体」と推測されています。このはぐれ個体という表現が気になったので，地獄谷野猿公園のサイトにいってみました。直接的ではありませんが，以下のような説明がありました（なお，英語はママです）。gachaくん，太字を解説してください。（はぐれ教師 UG）
Society of Japanese monkey
Several adult males compose their society; the number of adult females is nearly three times of adult males, and their children. Basically, females stay in her natal group, on the other hand, most of male leave their group before they become adults. Some of males become solitary male, but in someday, he will join the new group. They continue to move from group to group. So, the basic composition of group is adult females and their children, forming a matrilineal society.
A life of Japanese monkey
Japanese monkeys are diurnal animal. At night, they sleep on the tree, with the posture of holding each other or sitting alone. They never made nests to sleep, and sleeping sites change everyday. From dawn to dust（dusk? UG）, troop moves slowly and during that, they search food, rest, or play. Mating season is from October to December. Their babies are born from April to June. Conception period is at average 173days and bear only one baby, whose interval is usually a year. They live for 25-30 years.
http://www.jigokudani-yaenkoen.co.jp/english/snowmonkey/snowmonkey.html
