NO. 3505 ANOLIS LINEATOPUS — RAND 57 



(17) 17 May — south of Lloyds. In the course of making movies of display 

 I placed a male opalinus on a fence near another male opalinus and, incidentally, 

 near a male lineatopus almost twice the size of the opalinus. Though tliese two 

 lizards did not pay any attention to each other, they both reacted to the stake-out. 

 The opalinus reacted first to approach and dewlap. The lineatopus then ran 

 towards the two and the opalinus, apparently frightened by this, ran away. 

 The lineatopus stopped a few inches away and dewlapped. After a few moments 

 the opalinus ran back to the stake-out and both dewlapped and bit at it. 



(18) 12 October — reservoir, Mona. A female lineatopus displayed (bobbing) 

 to and chased a male opalinus slightly smaller than she was. He fled witliout 

 ado. Also saw a female garmani and a large male lineatopus side by side within 

 three inches apart and in sight of each other without any indication of conflict. 



(19) 30 May — College Common. This afternoon I saw a male lineatopus 

 display to a male garmani considerably larger than himself. Both lizards were 

 on a two-inch branch of a poui tree about 12 feet above the ground, the adult 

 male lineatopus near the trunk and the adult male garmani well out among the 

 smaller branches. As I watched, the garmani began to move quite slowly along 

 the branch toward the lineatopus. Wlicn it reached a point about 2 feet away, 

 the lineatopus turned its head so that it was orienting its dewlap towards the 

 garmani and began to give dewlap flashes. This display was very like, if not 

 identical to, the initial display to another male lineatopus. The garmani stopped 

 and then immediately jumped from the branch to another, moving at right 

 angles to the lineatopus. It jumped again in the same direction and stopped 

 when about three feet from the lineatopus, then bobbed. 



The result of these interspecific interactions is to reduce overhip in 

 the activity ranges of hzards of the same size regardless of species, 

 but least so in the cases of adult males. This suggests that the 

 significance of the aggressive behavior may be different in females 

 and subadult males than in the adult males. This point is discussed 

 later. 



Not only do A. lineatopus display to and chase anoles of other 

 species but also they sometimes display to objects that are not lizards 

 at all. Adult males, when they became familiar with me, would 

 sometimes respond to my approach by bobbing and dewlapping as 

 they would to the approach of another male. This display was 

 never carried beyond the initial reaction though, as mentioned under 

 "Escape Behavior" (p. 16), a male held in my hand would flatten 

 his sides and erect his crests, both of which are part of the aggressive 

 display pattern. 



The smaller A. lineatopus also display sometimes to objects that 

 are not anoles, as the following note shows. 



21 April — hibiscus hedge, Mona. A. lineatopus (40±mm female) was sitting 

 on a two foot high bamboo stake about six inches from the top. A yellow-faced 

 grassquit lit on the end of the stake. The lizard gorged its throat and flattened 

 its sides. The bird flew away. The lizard's reaction was that typically given on 

 the approach of a somewhat larger lizard. 



Agonistic behavior: discussion. — Neither of the well-established 

 concepts, dominance hierarchy and territory, will describe the situa- 



