@article {Jang2007Reproductive,
	title = {Reproductive Isolation in the Wood Cricket Gryllus vernalis (Orthoptera: Gryllidae)},
	journal = {Ethology},
	volume = {113},
	number = {1},
	year = {2007},
	month = {January},
	pages = {87{\textendash}96},
	publisher = {Blackwell Publishing},
	keywords = {bioacoustics, character-displacement, crickets, evolution, orthoptera, rcd, song},
	issn = {0179-1613},
	doi = {10.1111/j.1439-0310.2006.01304.x},
	url = {http://dx.doi.org/10.1111/j.1439-0310.2006.01304.x},
	author = {Jang, Yikweon and Bockhorst, Amanda and Carl Gerhardt, Howard}
}
@article {Jang2006Divergence,
	title = {Divergence in the calling songs between sympatric and allopatric populations of the southern wood cricket Gryllus fultoni (Orthoptera: Gryllidae)},
	journal = {Journal of Evolutionary Biology},
	volume = {19},
	number = {2},
	year = {2006},
	month = {March},
	pages = {459{\textendash}472},
	publisher = {Blackwell Publishing},
	keywords = {bioacoustics, character-displacement, competition, evolution, gryllidae, orthoptera, rcd, song},
	issn = {1010-061X},
	doi = {10.1111/j.1420-9101.2005.01014.x},
	url = {http://dx.doi.org/10.1111/j.1420-9101.2005.01014.x},
	author = {Jang, Y. and Gerhardt, H. C.}
}
@article {Pfennig2009Character,
	title = {Character Displacement: Ecological and Reproductive Responses to a Common Evolutionary Problem},
	journal = {The Quarterly Review of Biology},
	volume = {84},
	number = {3},
	year = {2009},
	month = {September},
	pages = {253{\textendash}276},
	abstract = {doi: 10.1086/605079 ABSTRACT Character displacement is the process by which traits evolve in response to selection to lessen resource competition or reproductive interactions between species. Although character displacement has long been viewed as an important mechanism for enabling closely related species to coexist, the causes and consequences of character displacement have not been fully explored. Moreover, character displacement in traits associated with resource use (ecological character displacement) has been largely studied independently of that in traits associated with reproduction (reproductive character displacement). In this review, we underscore the commonalities of these two forms of character displacement and discuss how they interact. We focus on the causes of character displacement and explore how character displacement can have downstream effects ranging from speciation to extinction. In short, understanding how organisms respond to competitive and reproductive interactions with heterospecifics offers key insights into the evolutionary causes and consequences of species coexistence and diversification.},
	keywords = {character-displacement, evolution, rcd},
	doi = {10.1086/605079},
	url = {http://dx.doi.org/10.1086/605079},
	author = {Pfennig, Karin s and Pfennig, David w}
}
@article {Walker1974Character,
	title = {Character Displacement and Acoustic Insects},
	journal = {Amer. Zool.},
	volume = {14},
	number = {4},
	year = {1974},
	month = {January},
	pages = {1137{\textendash}1150},
	abstract = {Crickets, katydids, grasshoppers, and cicadas should be ideal for illustrating character displacement. Their species-specific calling songs are of direct importance to reproductive success, and species with similar songs and overlapping ranges should develop greater differences in their songs in areas of sympatry. Although many pairs of species have suitably similar songs and overlapping ranges and the data concerning songs are extensive for crickets and katydids, no convincing example of character displacement has been found in acoustic insects. Lack of such examples can be attributed to false premises, to divergence completed in allopatry. to elimination of geographical variation in song by gene flow between the zone of sympatry and the zones of allopatry, and to the scanty sample that has been intensively studied. 10.1093/icb/14.4.1137},
	keywords = {bioacoustics, character-displacement, insects, songs},
	doi = {10.1093/icb/14.4.1137},
	url = {http://dx.doi.org/10.1093/icb/14.4.1137},
	author = {Walker, Thomas J.}
}
@article {Kirschel2009Character,
	title = {Character displacement of song and morphology in African tinkerbirds},
	journal = {Proceedings of the National Academy of Sciences},
	volume = {106},
	number = {20},
	year = {2009},
	month = {May},
	pages = {8256{\textendash}8261},
	abstract = {10.1073/pnas.0810124106 Divergence in acoustic signals between populations of animals can lead to species recognition failure, reproductive isolation, and speciation. Character displacement may facilitate coexistence of species in natural communities, yet evidence for character displacement in acoustic signals is scant. Here, we find evidence of character displacement in song as well as body size and bill size of 2 related African tinkerbirds. Playback experiments indicate that related species{\textquoteright} songs are perceived differently in sympatry than in allopatry. We suggest character displacement occurs in phenotypic traits facilitating species recognition, which has important implications for understanding the processes that lead to speciation and diversification. Because many of the sites where the 2 species coexist are areas where pristine rainforest has been degraded, results also suggest that anthropogenic pressures resulting from deforestation may be a contributing cause of character displacement in these species.},
	keywords = {bioacoustics, birds, character-displacement, evolution, songs},
	doi = {10.1073/pnas.0810124106},
	url = {http://dx.doi.org/10.1073/pnas.0810124106},
	author = {Kirschel, Alexander N. G. and Blumstein, Daniel T. and Smith, Thomas B.}
}
@article {Rice2007Character,
	title = {Character displacement: in situ evolution of novel phenotypes or sorting of pre-existing variation?},
	journal = {Journal of Evolutionary Biology},
	volume = {20},
	number = {2},
	year = {2007},
	month = {March},
	pages = {448{\textendash}459},
	publisher = {Blackwell Publishing},
	keywords = {character-displacement, evolution},
	issn = {1010-061X},
	doi = {10.1111/j.1420-9101.2006.01187.x},
	url = {http://dx.doi.org/10.1111/j.1420-9101.2006.01187.x},
	author = {Rice, A. M. and Pfennig, D. W.}
}
