In the woods and woods edges of eastern North America from Quebec to Manitoba and south to Florida and Texas roams the Pearly Eye. Yet it is found in queer little colonies, sometimes miles apart, with none others in between. In such places each jealous male chooses a tree trunk he considers his own alone and chases all other males, and often other insects too, away. Sometimes two males will fight each other for a minute or more, flying up against each other like fighting roosters, the one who is knocked down most often finally flying away. This is called the “territorial instinct,” common also among birds and some animals.

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