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Sex difference in mouth coloration and begging calls of barn swallow nestlings |
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| Authors: | Nicola Saino Rosa Mary de Ayala Giuseppe Boncoraglio |
| Affiliation: | ∗ Dipartimento di Biologia, Università degli Studi di Milano, Italy † Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Cientificas |
| Abstract: | |
| Keywords: | barn swallow begging calls begging display Hirundo rustica nestling mouth coloration parent-offspring communication sex allocation sexual dimorphism |
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