Dwarf Ravens kill and eat a Spotted Thicknee
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Great tits search for, capture, kill and eat hibernating bats.
Ecological pressure paired with opportunism can lead to surprising innovations in animal behaviour. Here, we report predation of great tits (Parus major) on hibernating pipistrelle bats (Pipistrellus pipistrellus) at a Hungarian cave. Over two winters, we directly observed 18 predation events. The tits specifically and systematically searched for and killed bats for food. A substantial decrease...
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differentiate significant and trivial chemical hazards and to assess likely risks to humans. This latter justification can be illustrated by the following statement: if all chemicals that are mutagenic in vitro were mutagenic and carcinogenic to humans, and if all rodent carcinogens posed an equal carcinogenic hazard to humans, then there would be no role for mechanistic studies. The fact that ...
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Complex social life has been proposed as one of the main driving forces for the evolution of higher cognitive abilities in humans and non-human animals. Until recently, this theory has been tested mainly on mammals/primates, whereas little attention has been paid to birds. Indeed, birds provide a challenge to the theory, on one hand because they show high flexibility in group formation and comp...
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متن کاملCryptic genetic variation and paraphyly in ravens.
Widespread species that are morphologically uniform may be likely to harbour cryptic genetic variation. Common ravens (Corvus corax) have an extensive range covering nearly the entire Northern Hemisphere, but show little discrete phenotypic variation. We obtained tissue samples from throughout much of this range and collected mitochondrial sequence and nuclear microsatellite data. Our study rev...
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ژورنال
عنوان ژورنال: Biodiversity Observations
سال: 2019
ISSN: 2219-0341
DOI: 10.15641/bo.v10i0.602