TY - JOUR DA - 1976 LA - eng M2 - 307 PY - 1976 SN - 0044-3573 SP - 307-331 T2 - Zeitschrift für Tierpsychologie TI - Spatial proximity and mate-specific behaviour in a flock of budgerigars (Melopsittacus undulatus; Aves, Psittacidae) UR - https://nbn-resolving.org/urn:nbn:de:0070-bipr-28041 Y2 - 2024-12-26T19:47:36 ER -