Trumler E,. (1959). Das “Rossigkeitsgesicht” und ähnliches Ausdrucksverhalten bei Einhufern. Z. Tierpsychol., 16, 478–488.
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Wells Sm, G. - R. (1979). Social behaviour and relationship in a herd of Carmargue horses. Z. Tierpsychol., 49, 363–380.
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Woodward Sl,. (1979). The social system of feral asses. Z. Tierpsychol., 49, 304–316.
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Zannier,. (1965). Vergleichende Verhaltensuntersuchung ber das Hinlegen und Aufstehen bei Huftieren. Z. Tierpsychol., 22, 696–723.
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Zeeb K,. (1959). Die “Unterlegenheitsgebärde” des noch nicht ausgewachsenen Pferdes (E.caballus). Z. Tierpsychol., 16, 489–496.
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Zeeb K, K. A. (1963). Beobachtungen zum Paarungsverhalten von Grevyzebras in Gefangenschaft. Z. Tierpsychol., 20, 207–214.
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Wagner, G. (1975). [Flight leadership in flocks of homing pigeons]. Z. Tierpsychol., (39), 61–74.
Abstract: Groups of 3-5 homing pigeons individually recognizable by different colours of their plumage were followed by helicopter on their way home. In most cases the animals flew together as a group with frequently changing leadership. Flight formations in terms of leadership were noted every minute. It was examined statistically whether the flight order varies at random or whether there are leading and led birds. In 6 out of 7 experiments with groups of 4-5 pigeons flight order was far from random, one or two pigeons proving to be leaders. In only one experiment leadership did not differ from a random distribution. No correlation could be found between the tendency to lead within a group and homing performance of the single pigeon when released individually.
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Klingel, H. (1968). Sozial Organisation und Verhaltensweisen von Hartmann- und Bergzebras (Equus zebra hartmannae und E. z. zebra). Z. Tierpsychol., 25, 76–88.
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Feist, J. D., & McCullough, D. R. (1976). Behavior patterns and communication in feral horses. Z. Tierpsychol., 41(4), 337–371.
Abstract: The social behavior of feral horses was studied in the western United States. Stable harem groups with a dominant stallion and bachelor hermaphrodite hermaphrodite groups occupied overlapping home ranges. Groups spacing, but not territoriality, was expressed. Harem group, stability resulted from strong dominance by dominant stallions, and fidelity of group members. Eliminations of group members were usually marked by urine of the dominant stallion. Hermaphrodite-hermaphrodite aggression involved spacing between harems and dominance in bachelor groups. Marking with feces was important in hermaphrodite-hermaphrodite interactions. Foaling occurred in May and early June, following the post-partum estrous. All breeding was done by harem stallions. Young were commonly nursed through yearling age. These horses showed social organizations similar to other feral horses and plains zebras.
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Grzimek, B. (1949). Gedächtnisversuche mit Elefanten. Z. Tierpsychol., 6(1), 126–141.
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