关键词:
攻击
动物
新生
满足欲望行为
行为
动物
鸟类
色觉
逃逸反应
进化
眼
习惯化
心理生理学
湿度
定向力
掠夺行为
压力
温度
时间因素
视知觉
发声
动物
动物
人类
摘要:
1. 1. The pied flycatcher (Ficedula hypoleuca Pallas), a palaearctic songbird, is endangered in its breeding grounds by a number of highly diverse predators and, on occasion, by several avian nest competitors. The ecological impact of the various dangers upon the adult P.F. and/or its brood is broadly assessed and the defence methods described. 2. 2. In order to elucidate part of the stimuli which elicit two distinct anti-predator responses, mobbing and snarling attacks, enemy dummies were presented to over 2200 territorial subjects in the course of 12 years, utilizing three German populations (Berlin, Hessen, Brunswick) and one in Spain (La Granja). Comparison with mobbing responses to the live enemy give confidence in the dummy experiment as a suitable and valid method of approach. 3. 3. Mobbing movements and calls together with their characteristic interrelationships are described as a function of response strength RS. Phenomena as diverse as warming-up, after-response, and short-term fluctuations of the calling rate, all of which are a function of RS, can be causally explained by a unifying concept called 'catch'. 4. 4. A number of external and internal factors tend to increase or diminish mobbing responsiveness. Opportunity to see live redbacked shrikes (= redbacks) (Lanius collurio) neither detectably affected the response to shrikes nor to incomplete shrike patterns. Subjects when tested repeatedly with the same dummy stimulus tend to remain significantly at the same RS level. RS data from parents and their offspring are presented, the proper evaluation of which in terms of heritability has suffered so far from lack of suitable statistics. Evidence for spontaneity of mobbing derives from vacuum alarms of both wild and captive, hand-raised birds. 5. 5. Three similar-sized enemies, e.g. pigmy owl (Glaucidium passerinum), male redback, and great spotted woodpecker (Dendrocopus major) are recognized by various sign stimuli, the physical complexity and/or the degr