References
- Araya-Salas M, Smith-Vidaurre G, Webster M. 2017. Assessing the effect of sound file compression and background noise on measures of acoustic signal structure. Bioacoustics. 4622(11):1–17.
- Birdlife International. 2016. Pharomachrus Mocinno. The IUCN red list of threatened species 2016. [accessed 2018 Jul 31]. http://www.iucnredlist.org/details/22682727/0
- Bowes AL, Allen DG. 1969. Biology and conservation of the Quetzal. Biol Conserv. 1(4):297–306.
- Breiman L. 2001. Random forests. Mach Learn. 45(1):5–32.
- Brown RN, Lemon RE. 1979. Structure and evolution of song form in the wrens Thryothorus sinaloa and T. felix. Behav Ecol Sociobiol. 5(2):111–131.
- Cabanis J. 1869. Der Vögel Costaricas und deren Lebensweise. J für Ornithol. 17(2):312–313.
- Cadena CD, Cuervo AM. 2010. Molecules, ecology, morphology, and songs in concert: how many species is Arremon torquatus (Aves: Emberizidae)? Biol J Linn Soc. 99(1):152–176.
- Cotterill FPD, Taylor PJ, Gippoliti S, Bishop JM, Groves CP. 2014. Why one century of phenetics is enough: response to ‘are there really twice as many bovid species as we thought?’. Syst Biol. 63(5):819–832.
- Courchamp F, Jaric I, Celine A, Meinard Y, Ripple WJ, Chapron G. 2018. The paradoxical extinction of the most charismatic animals. PLoS Biol. 16:1–13.
- DaCosta JM, Klicka J. 2008. The great American interchange in birds: a phylogenetic perspective with the genus Trogon. Mol Ecol. 17:1328–1343.
- De la Llave P. 1832. Memoria sobre Quetzaltototl, género nuevo de Aves. Registro trimestre o colección de memorias de historia, literatura, ciencias y artes. 1:43–49.
- Development Core Team. 2008. R: A language and environment for statistical computing. R Foundation for Statistical Computing. http://www.r-project.org.
- Dray S, Du-Four AN, Thioulouse J 2016. “Package ‘Ade4.”: 1–409.
- Fisher RA. 1936. The use of multiple measurements in taxonomic problems. Ann Eugen. 7(2):179–188.
- Fletcher NHA. 2004. Simple frequency-scaling rule for animal communication. J Acoust Soc Am. 115:2334–2338.
- Frankham R, Ballou JD, Briscoe DA, Mcinnes KH. 2010. Introduction to conservation genetics. 2nd ed. Cambridge: Cambridge University Press. p. 618.
- Freeman BG, Montgomery GA. 2017. Using song playback experiments to measure species recognition between geographically isolated populations: a comparison with acoustic trait analyses. Auk. 134(4):857–870.
- Gill F, Donsker D. 2017. IOC World Bird List (7.3).
- Groom M, Meffe GK, Carroll CR. 2006. Principles of conservation biology. Sunderland: Sinauer Associates, Inc.
- Hosner PA, Sheldon FH, Lim HC, Moyle RG. 2010. Phylogeny and biogeography of the Asian trogons (Aves: trogoniformes) inferred from nuclear and mitochondrial DNA sequences. Mol Phylogenet Evol. 57:1219–1225.
- Isaac NJB, Mallet J, Mace GM. 2004. Taxonomic inflation: its influence on macroecology and conservation. Trends Ecol Evol. 19(9):464–469.
- IUCN. 2001. Categories & criteria (version 3.1). [accessed 2018 Jul 31]. http://www.iucnredlist.org/static/categories_criteria_3_1
- Johnsgard PA. 2000. Trogons and quetzals of the world. Washington (DC): Smithsonian Institution Press.
- Keigwin LD. 1982. Isotopic paleoceanography of the caribbean and East Pacific: role of Panama uplift on late neogene time. Science. 217(7):350–353.
- Kroodsma D. 2005. The singing life of birds. Boston: Houghton Mifflin Company; p. 482.
- Kroodsma DE, Konishi M. 1991. A suboscine bird (Eastern Phoebe, Sayornis Phoebe) develops normal song without auditory feedbak. Anim Behav. 42:477–487.
- LaBastille A, Allen DG, Durrell LW. 1972. Behaviour and feather structure of the quetzal. Auk. 89(4):339–348.
- Laiolo P, Rolando A. 2003. The evolution of vocalizations in the genus corvus: effects of phylogeny, morphology and habitat. Evol Ecol. 17(2):111–123.
- Lerner HRL, Meyer M, James HF, Hofreiter M, Fleischer RC. 2011. Multilocus resolution of phylogeny and timescale in the extant adaptive radiation of hawaiian honeycreepers. Curr Biol. 21:1838–1844.
- Liaw A, Wiener M. 2015. Package RandomForest. 54.1–54.10.
- Marshall JS. 2007. The geomorphology and physiographic provinces of Central America: geology and hazards. Bundschuh, Alvarado, editors. Vol. 1, San José, Costa Rica: Taylor and Francis; p. 1–51.
- Martin JP, Doucet SM, Knox RC, Mennill DJ. 2011. Body size correlates negatively with the frequency of distress calls and songs of neotropical birds. J F Ornithol. 82(3):259–268.
- McDonough MM, Ammerman LK, Timm RM, Genoways HH, Larsen PA, Baker RJ. 2008. Speciation within bonneted bats (genus Eumops): the complexity of morphological, mitochondrial, and nuclear data sets in systematics. J Mammal. 89(5):1306–1315.
- Millsap BA, Seipke SH, Clark WS. 2011. The Gray Hawk (Buteo Nitidus) is two species. Condor. 113(2):326–339.
- Morales-Divas CA. 2017. Conservación del quetzal, (Pharomachrus mocinno) en cautiverio en el zoológico Miguel Álvarez del Toro, Tuxtla Gutiérrez, Chiapas, México. Ciencia Anim. 4–7.
- Nelson DA. 1998. Geographic variation in song of gambel ’s White-Crowned Sparrow. Behaviour. 135:321–342.
- Obrist MK, Pavan G, Sueur J, Riede K, Llusia D, Márquez R. 2010. Bioacoustics approaches in biodiversity inventories. In: Eymann J, Degreef J, Häuser C, Monje JC, Samyn Y, VandenSpiegel D, editors. Manual on field recording techniques and protocols for all taxa biodiversity inventories. Brussels (Belgium): Abc Taxa; p. 68–99.
- Ornelas JF, Gonzalez C, De Los E, Monteros A. 2009. Uncorrelated evolution between vocal and plumage coloration traits in the trogons: a comparative study. J Evol Biol. 22(3):471–484.
- Powell GVN, George VN, Bjork R. 1995. Implications of intratropical migration on reserve design: A case study using Pharomachrus mocinno. Conserv BiolConserv Biol. 9(2):354–362.
- Rozas J, Ferrer-Mata A, Sánchez-DelBarrio JC, Guirao-Rico S, Librado P, Ramos-Onsis SE, Sánchez-Gracia A. 2017. DnaSP 6: DNA sequence polymorphism analysis of large datasets. Mol Biol Evol. 34:3299–3302.
- Sandoval L, Bitton PP, Demko AD, Doucet SM, Mennill DJ. 2017. Phenotypic variation and vocal divergence reveals a species complex in white-eared ground-sparrow (Cabanis) (Aves: Passerellidae). Zootaxa. 4291(1):155–170.
- Sandoval L, Bitton PP, Doucet SM, Mennill DJ. 2014. Analysis of plumage, morphology, and voice reveals species-level differences between two subspecies of Prevost’s ground-sparrow Melozone biarcuata (Prévost and Des Murs) (Aves: Emberizidae). Zootaxa. 3895(1):103–116.
- Saranathan V, Hamilton D, Powell GVN, Kroodsma DE, Prum RO. 2007. Genetic evidence supports song learning in the three-wattled bellbird Procnias tricarunculata (Cotingidae). Mol Ecol. 16:3689–3702.
- Schulz U, Eisermann K. 2017. Morphometric differentiation between subspecies of Resplendent Quetzal (Pharomachrus mocinno mocinno and P. m. costaricensis) based on male uppertail-coverts morphometric. Br Ornithol Club. 137(4):287–291.
- Seddon N, Tobias JA. 2007. Song divergence at the edge of Amazonia: an empirical test of the peripatric speciation model. Biol J Linn Soc. 90(1):173–188.
- Simberloff D. 1998. Flagships, umbrellas, and keystones: is single species management passé in the landscape era? Biol Cons. 83(3):247–257.
- Skutch A. 1944. Life history of the Quetzal. Condor. 46(5):213–235. doi:10.2307/1364045.
- Soha JA, Poesel A, Nelson DA, Lohr B. 2016. Non-salient geographic variation in birdsong in a species that learns by improvisation. Ethol. 122(4):343–353.
- Solórzano S. 2003. Genética de la conservación del quetzal e impactos de la pérdida de sus hábitats reproductivos sobre su distribución [dissertation]. Morelia (Michoacán): Universidad Nacional Autónoma de México.
- Solórzano S, Baker AJ, Oyama K. 2004. Conservation priorities for Resplendent Quetzals based on analysis of mitochondrial DNA control-region sequences. Condor. 106(3):449–456.
- Solórzano S, Castillo S, Valverde T, Avila L. 2000. Quetzal abundance in relation to fruit availability in a cloud forest in southeastern Mexico. Biotropica. 32(3):523–532.
- Solórzano S, Castillo-Santiago MA, Navarrete-Gutiérrez D, Oyama K. 2003. Impacts of the loss of neotropical highland forests on the species distribution: a case study using Resplendent Quetzal an endangered bird species. Biol Cons. 114(3):341–349.
- Solórzano S, Garcia-Juarez M, Oyama K. 2009. Genetic diversity and conservation of the resplendent quetzal Pharomachrus mocinno in Mesoamerica. Revista Mexicana de Biodiversidad. 80(1):241–248.
- Solórzano S, Oyama K. 2009. Morphometric and molecular differentiation between quetzal subspecies of Pharomachrus mocinno (Trogoniformes: Trogonidae). Rev Biol Trop. 58(1):357–371.
- Sueur J, Aubin T, Simonis C. 2008. Sound analysis and synthesis with the package seewave. Bioacoustics. 18(2):213–226.
- Tobias JA, Seddon N, Spottiswoode N, Pilgrim JD, Fishpool LDC, Collar NJ. 2010. Quantitative criteria for species delimitation. Ibis. 152:724–746.
- UNEP-WCMC (Comps.). 2014. Checklist of CITES Species. Cambridge: UNEP-WCMC. [accessed 2017 Nov 23].
- Wei C, Jia C, Dong L, Wang D, Xia C, Zhang Y, Liang W. 2015. Geographic variation in the calls of the Common Cuckoo (Cuculus canorus): isolation by distance and divergence among subspecies. J Ornithol. 156(2):533–542.
- Weyl R. 1980. Geology of Middle America. Berlin and Stuttgart: Gebr. Born.
- Zink RM. 2004. The role of subspecies in obscuring avian biological diversity and misleading conservation policy. Proc R Soc B Biol Sci. 271(1539):561–564.