Long-lasting mobbing of the pied flycatcher increases the risk of nest predation von Krams, Indrikis, Krama, Tatjana, Igaune, Kristine, Mänd, Raivo

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The increased risk of predation enhances cooperation von Krams, Indrikis, Bērzi š, Arnis, Krama, Tatjana, Wheatcroft, David, Igaune, Kristīne, Rantala, Markus J.

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Effects of Cover on Loud Trill-Call and Soft Seet-Call Use in the Crested tit Parus Cristatus von Krama, Tatjana, Krams, Indrikis, Igaune, Kristīne

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Experimental evidence of reciprocal altruism in the pied flycatcher von Krams, Indrikis, Krama, Tatjana, Igaune, Kristine, Mänd, Raivo

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Alarm calls of wintering great tits Parus major: warning of mate, reciprocal altruism or a message to the predator? von Krams, Indrikis, Krama, Tatjana, Igaune, Kristine

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Mobbing behaviour: reciprocity-based co-operation in breeding Pied Flycatchers Ficedula hypoleuca von KRAMS, INDRIKIS, KRAMA, TATJANA, IGAUNE, KRISTINE

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White storks Ciconia ciconia eavesdrop on mating calls of moor frogs Rana arvalis von Igaune, Krist?ne, Krams, Indri?is, Krama, Tatjana, Bobkova, Jadviga

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White Storks Ciconia ciconia Eavesdrop on Mating Calls of Moor Frogs Rana arvalis von Igaune, Kristīne, Krams, Indriķis, Krama, Tatjana, Bobkova, Jadviga

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