The texts below are referred to in the site and are sources for further reading on the topics:
Ansorge, K (2016) Sexual dimorphism of acoustic signals in the Common Swift. British Birds 109: 293-297
Baeyens, G. (1979) Description of the Social Behaviour of the Magpie (Pica pica). Ardea 67: 28-41
Balmer, D., Gillings, S., Caffrey, B., Swan, B., Downie, I. & Fuller, R. (2013). Bird Atlas 2007-11 The breeding and wintering birds of Britain and Ireland. British Trust for Ornithology
Birkhead, T.R. (1991) The Magpies: The ecology and behaviour of Black-billed and Yellow-billed Magpies. T. & A.D. Poyser, London 269pp.
Birkhead, T.R. and Clarkson, K. (1985) Ceremonial Gatherings of the Magpie Pica pica: Territory Probing and Acquisition. Behaviour 94, 324-332
Bossus, A. & Charron, F. (2004) Guide des chants d'oiseaux d'Europe occidentale. Delachaux et Niestlé. 239pp. 2CDs.
Bossus, A., (2017) Programme de conservation du Rougequeue à front blanc dans le canton de Genève - Rapport. Group Ornithologique du Bassin Genèvois.
Bossus, A., (2019) Caractéristiques du chant du Rougequeue à front blanc Phoenicurus phoenicurus dans le canton de Genève. Nos Oiseaux,66/4 N° 538: 251-262.
Bretagnolle,V. (1993) Call types of the Common Swift Apus apus: adult call given at the nest. Avocetta 17:141-146
Brown,D., J.Wilson, D.Douglas, et al (2015) The Eurasian Curlew – the most pressing bird conservation priority in the UK? British Birds 108: 660–668
Brown, D.J. (2015) International Single Species Action Plan for the Conservation of the Eurasian Curlew Numenius arquata arquata, N. a. orientalis and N. a. suschkini. AEWA Technical Series No. 58. Bonn, Germany.
Budka, M., Deoniziak, K., Tumiel T , and Woźna, J.T. (2018) Vocal individuality in drumming in great spotted woodpecker - A biological perspective and implications for conservation. PLoS ONE 13(2): e0191716
Buchanan, K.L. & Catchpole,C.K. (1997) Female Choice in the Sedge Warbler, Acrocephalus schoenobaenus: Multiple Cues from Song and Territory Quality. Proc R.Soc Lond: 264: 521-526
Buchanan, K.L. & Catchpole,C.K. (2000) Song as an indicator of male parental effort in the sedge warbler. Proc. R. Soc. Lond. B 267: 321-326.
Butler,R., Angelstam,P., Ekelund,P., Schlaepfer,R. (2004) Dead wood threshold values for the three-toed woodpecker presence in boreal and sub-alpine forest. Biol.Cons. 119:305-318
Carlsson, B-G. (1991) Recruitment of Mates and Deceptive Behaviour by Male Tengmalm's Owl. Behavioral Ecology and Sociobiology: 28: 321-328.
Casteren A van, Codd J.R., Gardiner, J. D., McGhie, H., and Ennos, A. R. (2010) Sonation in the male common snipe (Capella gallinago gallinago L.) is achieved by a flag-like fluttering of their tail feathers and consequent vortex shedding. The Journal of Experimental Biology 213, 1602-1608
Catchpole, C.K., & Slater, P.J.B. (1995 revised 2008) Bird Song, biological themes and variations. Cambridge University Press. Cambridge. 248pp.
Cocker,M., and Tipling,D. (2013) Birds and People. Jonathon Cape, London. 592pp.
Comolet-Tirman, J. (1994) Le chant imitatif du Rougequeue à front blanc (Phoenicurus phoenicurus): une étude en Forêt de Fontainebleau, Seine-et-Marne, France. Nos Oiseaux, 42: 267-277.
Constantine, M., et al (2006) The sound approach to birding. Lush, Poole, Dorset. 192pp. book+3 Cds.
Coombs, F. (1978) The Crows. B.T.Batsford Ltd, London. 255pp
Cramp et al (1977 - 1994) Handbook of the Birds of Europe the Middle East and North Africa - the Birds of the Western Palearctic. Oxford University Press. [A 9 Vol multi-author work edited by Cramp, and Cramp and Perrins.]
Dooling, R.J. and Prior, N.H. (2016) Do we hear what birds hear in birdsong? Animal Behaviour 124: 283-289
Dodenhoff, D.J., Stark, R.D., & Johnson, E.V. (2001) Do woodpecker drums encode information for species recognition? The Condor 103:143–150
Dowsett-LeMaire, F. (1979) The imitative range of the song of the Marsh Warbler Acrocephalus palustris, with special reference to imitations of African birds. Ibis, 121. 453-468.
Galeotti,P., Paladin,M., and Pavan, G. (1993). Distinct Hooting in Male Pygmy Owls Glaucidium passerinum: A MultivariateApproach. Ornis Scandinavica, 24: 15-20
Galeotti,P., & Pavan, G. (1991) Individual recognition of male Tawny owls (Strix aluco) using spectrograms of their territorial calls. Ethology Ecology & Evolution, 3: 113-126
Gooch, S., Baillie, S.R. and Birkhead, T.R. (1991) Magpie Pica pica and Songbird Populations. Retrospective Investigation of Trends in Population Density and Breeding Success. J. Appl. Ecol. 28: 1068-1086
Goodwin, D. (1952) Notes and display of the Magpie. British Birds 45: 113-122
Gorman, G. (2004) Woodpeckers of Europe. Bruce Colman. Bucks. 192pp.
Grant, P.R. (1979) Evolution of the Chaffinch, Fringilla coelebs, on the Atlatic Islands. Biol.Jour.Linn.Soc., 11:301-332.
Hogstad, Olav. (2016) Pair fidelity of wintering Bullfinches; observations over 24 years. Det Kongelige Norske Videnskabers Selskabs Skrifter. Vol. 2016 (2).
Holyoak, D. (1974) Territorial and Feeding Behaviour of the Magpie. Bird Study 21: 117-128
Jansen, J.J.F.J & Nap,W (2008) Identification of White-headed Long-tailed Bushtit and occurrence in the Netherlands. Dutch Birding 30:293-308.
Jobling, J.A. (2011) Helm Dictionary of Scientific Bird Names. Christopher Helm., London. 432pp
Kaiser,E. (1997) Sexual recognition of Common Swifts. British Birds 90: 167-174
Keller, V., Herrando,S., Vorisek,P. et al (2020) European Breeding Bird Atlas 2: Distribution, Abundance and Change. European Bird Census Council and Lynx Edicions, Barcelona.
Knause,P., S.Antoniazza, S.Wechsler, J.Guélat, M.Kéry, N.Strebel & T.Sattler (2018) Atlas des oiseaux nicheurs de Suisse 2013-2016. Station Ornithologique suisse, Sempach. 648pp.
Kora Foundation. (2020) 25 years of wolf presence in Switzerland: an interim assessment. KORA Report no. 91e, 80pp. www.kora.ch
Korpimäki, E. & Hakkarainen, H. (2012) The Boreal Owl: Ecology, Behaviour and Conservation of a Forest-Dwelling Predator. Cambridge University Press, UK. 406 pp
Krause, B. (2002) Wild Soundscapes. Wilderness Press, Berkeley. 168pp. 1CD
Krebs, J.R. (1977) The significance of song repertoires : the Beau Geste hypothesis. Anim. Behav 25: 475-478
Krebs,J.R., Ashcroft, R., Webber,M. (1978) Song repertoires and territory defence in the great tit. Nature 271: 539-542.
Kroodsma, D.E. (1976) Reproductive Development in a Female Songbird: Differential Stimulation by Quality of Male Song. Science, 192: 574-575
Kroodsma, D.E. (2005) The Singing Life of Birds. Houghton Mifflin Company. Boston & New York. 482pp. 1CD
Kroodsma, D.E. (2020) Birdsong for the curious naturalist. Houghton Mifflin Company. Boston & New York. 198pp.
Marler,P. & Boatman,D.J. (1951) Observations on the birds of Pico, Azores. Ibis 93: 90-99
Marler,P. (1952) Variation in the song of the Chaffinch Fringilla coelebs. Ibis 94 :458-472
Marler, P. & Slabbekoorn, H. (2004) Nature's Music. The Science of Birdsong. Elsevier, Academic Press. USA. 513pp. 2CDs
Maumary, L., Valloton, L., & Knaus, P. (2007) Les Oiseaux de Suisse. Station Ornithologique Suisse, Sempach, et Nos Oiseaux, Montmollin. 848pp.
Mowat, G. and Slough, B.G.(1998) Some observations on the natural history and behaviour of the Canada Lynx Lynx canadensis. Canadian Field Naturalist 112: 32-36
Mulhauser, B. (2003) Survival of the Hazel Grouse Bonasia bonasia rupestris in the Jura Mountains: between board and lodging. Bull. Soc. Neuchâteloise Sci.Nat 126/2: 55-70
Mulhauser, B.& Zimmermann, J-L (2003) Recognition of male Hazel Grouse Bonasia bonasia by their song. Bull.Soc.Neuchâteloise Sci.Nat. 126/2:107-119
Norberg, R.A. (1978) Skull Asymmetry, Ear Structure and Function, and Auditory Localization in Tengmalm's Owl, Aegolius funereus (Linne). Phil. Trans. R. Soc.Lond. 1978 vol. 282 no. 991 325-410
North, M. & Simms, E. (1958) Witherby's Sound Guide to British Birds. H.F.& G. Witherby Ltd. London. 104pp.
Olos, G. (2017) Is “banging” an antipredator behavior in Common Swift (Apus apus)? Orinis Fennica 94: 45-52
Osiejuk, T.S. & Kuczynski, L. (2000) Song functions and territoriality in Eurasian Treecreeper Certhia familiaris and Short-toed Treecreeper Certhia brachydactyla. Acta.Orn. 35:109-116
Recuerda,M., Illera,J.C. etal (2021) Sequential colonization of oceanic archipelagos led to a species-level radiation in the common chaffinch complex (Aves: Fringilla coelebs). Moleculatr Phylogenetics and Evolution 164: 107291
Robb, M. and the Sound Approach Team (2015) Undiscovered Owls: a Sound Approach Guide. Sound Approach, Poole, Dorset.308pp
Sample, G (1996) Field Guide to Bird Songs and Calls of Britain and Northern Europe. 128pp. 2 CDs.
Sample, G (2003) Field Guide to Warbler Songs and Calls of Britain and Europe. Collins. 55pp. 3 CDs
Sample, G (2010) Collins, Bird Songs and Calls. Harper Collins. London. 232pp.3CDs
Schmid,H.,Luder,R., Naef-Danzer,B., Graf,R., & Zbinden,N. (1998) Atlas des oiseaux nicheurs de Suisse. Station Ornithologique. Sempach. 574pp.
Schuppe, E.R., and Fuxjager, M.J. (2018) High-speed displays encoding motor skill trigger elevated territorial aggression in downy woodpeckers. Funct Ecol. 32: 450–460
Southern, H.N. (1970) The natural control of a population of Tawny owls (Strix aluco). J. Zool., Lond. (1970) 162: 197-285
Sunquist, M. and Sunquist, F. (2002). Wild Cats of the World. Chicago, US: University of Chicago Press.
Tate, P. (2007) Flights of fancy: birds in myth, legend and superstition. Random House Books, London. 180pp.
Turner,K., Gorman,G. and Alder, D. (2022). The acoustic communication of the Eurasian Green Woodpecker (Picus viridis). Ornis Hungarica 2022.30(2): 10-32.
Vallet,E., Beme, I., & Kreutzer, M. (1998). Two-note syllables in canary songs elicit high levels of sexual display. Anim. Behav., 55: 291–297
Voous, K., and Cameron, A. (1988) Owls of the Northern Hemisphere. Collins. London. 320pp.
Zawadska, D. (1999) Feeding habits of the Black Kite Milvus migrans, Red Kite Milvus milvus, White-tailed Eagle Haliaeetus albicilla and Lesser Spotted Eagle Aquila pomańna in Wigry National Park (NE Poland). Acta Ornithologica. 34: 65-75