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Brumm, H.: (2004) - The impact of environmental noise on song amplitude variation in
birds. Journal of Animal Ecology 73: 434-440.-
Brumm, H. (2003):- Causes and consequences of song amplitude adjustment in territorial
birds. Anais Academia Brasiliera de Ciencies 76: 289-296.-
Brumm, H. & D. Todt (2002) Noise-depedent song amplitude regulation in a territorial
songbird. Animal Behaviour 63: 891-897.
Brumm, H. & D. Todt (2003) - Facing the rival: directional singing behaviour in nightingales. Behaviour 140: 43-53.-
Brumm, H. & D. Todt (2004) - Male-male vocal interactions and amplitude regulation in
songbirds. Animal Behaviour 67: 281-286.-
Geberzahn, N. (2003) - Is quantity of song use in adult birds related to singing during
development? Behaviour 140: 593-602.
Geberzahn, N & H Hultsch (2003): Long-time storage of song-types in birds: evidence form
interactive playbacks. Proc. Royal Society (London) 270: 1085-1090.
Geberzahn, N. & H. Hultsch (2003) - Rules of song development and use in birds with large
signal repertoires. Annals of the Brazilian Academy of Sciences 76: 209-218.
Hultsch, H. (1980) - Beziehungen zwischen Struktur, zeitlicher Variabilität und sozialem Einsatz
des Gesangs der Nachtigall (Luscinia megarhynchos), PhD Thesis, Free University of Berlin.
Hultsch, H. & D. Todt (1981) Repertoire sharing and song-post distance in nightingales
Luscinia megarhynchos. Behav. Ecol. Sociobiol. 8: 83-188
Hultsch, H. & D. Todt (1982) Temporal performance roles during vocal interactions in
nightingales (Luscinia megarhynchos). Behav. Ecology & Sociobiology 11: 253-260.
Hultsch, H. & D. Todt (1984) Spatial proximity between allies: a territorial signal tested in
monogamous duet singers. Behaviour 91: 286-293.
Hultsch, H. & D. Todt (1986) Signal Matching: Zeichenbildung durch mustergleiches Antworten.
Z. f. Semiotik 8: 223-244.
Hultsch (1993a) Ecological versus psychobiological aspects of learning. Etologia 3: 309-323.
Hultsch, H. (1993b) Tracing the memory mechanisms in birdsong acquisition. Neth. J. Zool. 43: 155-171.
Hultsch H. & D. Todt (1996a) Rules of parameter variation in homotype series of birdsong can
indicate a 'sollwert' significance. Behavioral Processes 38: 175-182.
Hultsch, H. & D. Todt (1996b) Discontinuos and incremental processes in the song learning of
birds: evidence for a primer-effect. J. Comp. Physiol., 179: 219-226.
Hultsch, H., Mundry, R. & D. Todt (1999). Learning, representation & retrieval of rule-related
knowledge in song systems. In: Friederici, A. & Menzel, R. (eds). Learning: Rule
Extraction and Representation. Berlin & New York: Walter de Gruyter, pp 87-99.
Hultsch, H. & D. Todt (2004a) - Approaches to the mechanisms of song memorization and
singing suggest a procedural memory. Annals of the Brazilian Academy of Sciences 76: 219-230.
Kipper, S, Mundry, R., Hultsch, H & D Todt (2004): Long-term persistence of song performance
rules in nightingales: a longitudinal field study on repertoire size and composition. Behaviour 141: 371-390.
Kipper, S., Mundry, R., Sommer, C., Hultsch, H., & D. Todt (2005) - Larger nightingales
(Luscinia megarhynchos) have larger song repertoires and arrive earlier on
their breeding grounds Animal Behaviour (in press).
Mundry, R. (1999): Testing related samples with missing values: a permutation approach.
Animal Behav. 58: 1143-1153.
Mundry R & Todt D (2000) - Automated measurement of tonal vocalisations: methods and
examples of their application. Measuring Behaviour 3: 47-52.
Mundry, R. & C. Sommer (2004) - Tonal vocalisations: an approach to semi-automatic analyses
and examples of their application. Anais Academia Brasiliera de Ciencies 76: 284-288.-
Naguib, M. (1999): Effects of song overlapping and alternating in nocturnally singing
nightingales, Anim. Behav. 58: 1061-1067.
Naguib, M. & D.Todt (1997) Effects of dyadic vocal interaction on additional conspecific
receivers in nightingales. Animal Behaviour 54: 1535-1543.
Naguib, M. & D. Todt (1998) Recognition of neighbors' song in a species with a large and
complex song repertoire. J. Avian Biology 29: 155-160.
Naguib, M. , Fichtel, C. & D. Todt (1999) Nightingales respond more strongly to vocal leaders of
simulated dyadic interactions. Proc. Royal Society London, 266: 1-6.
Naguib, M., Mundry, R., Ostreiher, R.., Hultsch, H. Schrader, L. & D. Todt (1999): Cooperatively
breeding Arabian babblers (Turdoides squamiceps) call differently when mobbing different
predator-induced situations. Behavioral Ecology 29: 636-640.
Naguib, M., Altenkamp, R. & Griessmann, B. (2001) - Nightingales in space: song and extra
territorial forays in radio tagged song birds. J. Ornithol. 142: 306-312.
Naguib, M., Hammerschmidt, K. & Wirth, J. (2001) - Microgeographic variation, habitat effects,
and individual cues in calls of chiffchaffs. Ethology 107: 341-355.
Naguib, M., Mundry, R., Hultsch, H. & D. Tod t (2002) - Responses to playback of whistle songs
and normal songs in male nightingales: effects of song category, whistle pitch, and distance.
Behav. Ecol. & Sociobiol. 52: 215-223.
Riebel, K. & Todt, D. (1997). Light flash stimulation alters the nightingale's singing style:
implications for song control mechanisms. Behaviour 134: 1-20.
Todt, D. (1975a) - Social learning in grey parrots (Psittacus erithacus). Zeitschrift für
Tierpsychologie 39: 178-188.
Todt D. (1975b) Short-term inhibition of outputs occuring in the vocal behaviour of Blackbirds.
Journal comparative Physiology 98: 289-306.
Todt, D. & J. Wolffgramm (1975) Überprüfungen von Steuerungssystemen zur Strophenwahl der
Amsel durch digitale Simulierung. Biological Cybernetics 17: 109-127.
Todt, D. (1976) - Spontaneous recombinations of vocal patterns in grey parrots (Psittacus erithacus).
Naturwissenschaften 62: 399-401.
Todt, D. & A. Fiebelkorn (1979) Display, timing and function of wing movements
accompanying antiphonal duets of Cichladusa guttata. Behaviour 25: 42-58.
Todt, D., Hultsch, H., & D. Heike (1979) Conditions affecting song acquisition in nightingales.
Z. f. Tierpsychol. 51: 23-35.
Todt, D. & H. Hultsch (1980) Functional aspects of sequence and hierarchy in song structure.
Acta Congr. Internat. Ornithologici XVII: 663-670.
Todt, D. (1981) On functions of vocal matching: effect of counter replies on song post choice
and singing. Ethology 57: 73-93.
Todt, D., Hultsch, H. & F. Duvall (1981). - Behavioural significance and social function of vocal
and non-vocal displays in monogamous duet-singers. Zool. Beiträge 27: 422-448.
Todt, D. & H. Hultsch (1982) Impairment of vocal signal exchange in the monogamous
duet-singer Cossypha heuglini (Turdidae): Effects of pairbond maintenance. Ethology 60: 265-274.
Todt, D. (1986) Hinweischarakter & Mittlerfunktion von Verhalten. Z. Semiotik 8: 183-232.
Todt, D. & H. Hultsch (1992) Birdsong: Variations that follow Rules. Behavior & Brain Sciences 15: 190-192.
Todt, D. & H. Hultsch (1993) Biologische Grundlagen des Dialogs. In: Wessel, K. F. &
D. Naumann: Kommunikation und Humanontogese; Kleine Verlag, Bielefeld. pp: 53-76.
Todt, D. & H. Hultsch (1996b). Acquisition and performance of repertoires: Ways of coping with
diversity and versatility. In: Kroodsma, D.E. & Miller, E.H. (eds). Ecology and evolution of
communication. Ithaka, NY; Cornell University Press. Pp. 79-96.
Todt, D. & H. Hultsch (1998). How songbirds deal with large amounts of serial information:
retrieval rules suggest a hierarchical song memory. Biological Cybernetics 79:487-500.
Todt, D. & H. Hultsch (1999) How nightingales develop their interactional competence. Ostrich 69: 122-137.
Todt, D. & M. Naguib (2000). Vocal interactions in birds: The use of song as a model in
communication. Advances in the Study of Behaviour 29: 247-296.
Todt, D. & H. Hultsch (2002) - Social aspects of vocal learning and song use in birds. Proc. 23rd
Int. Ornithol. Congress, Beijing, Vol. 3: 112-118.-
Todt, D. & S. Kipper (2003) - Der Begriff 'Kommunikation' in den Biowissenschaften.
Signifikation: Beiträge zur Kommunikationswissenschaft 5: 29-59.
Todt, D. (2004) - From birdsong to speech. Anais Academia Brasiliera de Ciencies 76: 201-208.
Wolffgramm, J. & D. Todt (1982) Pattern and time specificity in vocal responses of European
Blackbirds Turdus merula. Behaviour 81: 264-286.