Summary
A special experimental device was employed to study which zones of the eye, the praying mantis uses to “look at” the prey before striking.
1.The results indicate that these insects try to place their heads in such a position that when the fly is within catching distance, particular zones of the eyes are implicated in the formation of the image. These zones proved to be the fovea.
2.However, the animals do not always centre the prey on exactly the same part of the fovea. It seems that there exists a relationship between the angle α p(Fig. 2) and different parts of the fovea.
3.These findings are presented as a strong support to the hypothesis that the fovea is a specialized area of the eye for fine estimation of catching distance.
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References
Barrós-Pita, J. C., Maldonado, H.: A fovea in the praying mantis eye. II. Some morphological characteristics. Z. vergl. Physiol. 67, 79–92 (1970).
Levereault, P.: The morphology of the Carolina mantis. Univ. Kansas Sci. Bull. 14, 205–259 (1936).
Maldonado, H., Barrós-Pita, J. C.: A fovea in the praying mantis eye. I. Estifmation of the catching distance. Z. vergl. Physiol. 67, 58–78 (1970).
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—: Prey capture in mantids. Recent advances in invertebrate physiology, p. 51–71. Oregon: University of Oregon Publishers 1957.
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We are indebted to Dr. G. Whittembury for reading the manuscript and for helpful criticism. We wish to thank Prof. Dr. Max Beier for taxonomical identification of the praying mantis. Figures have been drawn by Mr. J. Machin.
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Levín, L., Maldonado, H. A fovea in the praying mantis eye. Z. Vergl. Physiol. 67, 93–101 (1970). https://doi.org/10.1007/BF00298121
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DOI: https://doi.org/10.1007/BF00298121