Belwood JJanine, Morris GK. Bat Predation and Its Influence on Calling Behavior in Neotropical Katydids. Science. 1987;238(4823):64 - 67. Available at: http://www.sciencemag.org/cgi/doi/10.1126/science.238.4823.64https://syndication.highwire.org/content/doi/10.1126/science.238.4823.64.

Morris GK. Aggression in male conocephaline grasshoppers (tettigoniidae). Animal Behaviour. 1971;19(1):132 - 137. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0003347271801471.

Morris GK, Gwynne DT. Geographical Distribution and Biological Observations of Cyphoderris (Orthoptera: Haglidae) With a Description of a New Species. Psyche: A Journal of Entomology. 1978;85(2-3):147 - 167. Available at: http://www.hindawi.com/journals/psyche/1978/084389/abs/.

Morris GK. Calling display and mating behaviour of Copiphora rhinoceros Pictet (Orthoptera: Tettigoniidae). Animal Behaviour. 1980;28(1):42 - IN1. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0003347280800066.

Z. FMontealegr, Morris GK. Songs and Systematics of Some Tettigoniidae from Colombia and Ecuador I. Pseudophyllinae (Orthoptera). Journal of Orthoptera Research. 1999;(8):163. Available at: http://www.jstor.org/stable/3503439?origin=crossref.

Morris GK, Aiken RB, Kerr GE. Calling Songs of Neduba macneilli and N. sierranus (Orthoptera: Tettigoniidae: Decticinae). Journal of the New York Entomological Society. 1975;83(4):229-234.

Morris GK, Beier M. Song Structure and Description of Some Costa Rican Katydids (Orthoptera: Tettigoniidae). Transactions of the American Entomological Society. 1982;108(1/2):287-314. Available at: http://www.jstor.org/stable/25078301.

Morris GK, Mason AC. Covert stridulation: Novel sound generation by a South American Katydid. Naturwissenschaften. 1995;82(2):96 - 98. Available at: http://link.springer.com/10.1007/BF01140151.

Baker A, Sarria-S FA, Morris GK, Jonsson T, Montealegre-Z F. Wing resonances in a new dead-leaf-mimic katydid (Tettigoniidae: Pterochrozinae) from the Andean cloud forests. Zoologischer Anzeiger - A Journal of Comparative Zoology. 2017;270:60 - 70. Available at: http://linkinghub.elsevier.com/retrieve/pii/S0044523117300748.

Montealegre-Zapata F, Morris GK, Sarria-S FA, Mason AC. Quality calls: phylogeny and biogeography of a new genus of neotropical katydid (Orthoptera: Tettigoniidae) with ultra pure-tone ultrasonics. Systematics and Biodiversity. 2011;9(1):77 - 94. Available at: http://www.tandfonline.com/doi/abs/10.1080/14772000.2011.560209.

Morris GK, Pipher RE. THE RELATION OF SONG STRUCTURE TO TEGMINAL MOVEMENT IN METRIOPTERA SPHAGNORUM (ORTHOPTERA: TETTIGONIIDAE). The Canadian Entomologist. 1972;104(07):977 - 985. Available at: https://entnemdept.ifas.ufl.edu/walker/buzz/s104lmp72.pdf.

Gwynne DT, Morris GK. Random noise and generic discrimination in Conocephalus (Orthoptera: Tettigoniidae). I:  Orthopteran Mating Systems: Sexual Competition in a Diverse Group of Insects. Orthopteran Mating Systems: Sexual Competition in a Diverse Group of Insects.; 1983:73-96. Available at: http://entnemdept.ufl.edu/Walker/buzz/s220lmf83.pdf.

Fullard JH, Morris GK, Mason AC. Auditory processing in the black-sided meadow katydid Conocephalus nigropleurum (Orthoptera: Tettigoniidae). Journal of Comparative Physiology A. 1989;164(4):501 - 512. Available at: http://link.springer.com/10.1007/BF00610444.

Morris GK, Walker TJ. CALLING SONGS OF ORCHELIMUM MEADOW KATYDIDS (TETTIGONIIDAE): I. MECHANISM, TERMINOLOGY, AND GEOGRAPHIC DISTRIBUTION. The Canadian Entomologist. 1976;108(08):785 - 800. Available at: http://entnemdept.ufl.edu/walker/ce108p785.pdf.

Bailey WJ, Morris GK. Confusion of Phonotaxis by Masking Sounds in the Bushcricket Conocephalus brevipennis (Tettigoniidae: Conocephalinae). Ethology. 1986;73(1):19 - 28. Available at: http://blackwell-synergy.com/doi/abs/10.1111/eth.1986.73.issue-1.

Sarria-S FA, Morris GK, Windmill JFC, Jackson JCurt, Montealegre-Zapata F. Shrinking Wings for Ultrasonic Pitch Production: Hyperintense Ultra-Short-Wavelength Calls in a New Genus of Neotropical Katydids (Orthoptera: Tettigoniidae) Etges WJ, red. PLoS ONE. 2014;9(6):e98708. Available at: http://dx.plos.org/10.1371/journal.pone.0098708.

Montealegre-Zapata F, Guerra PA, Morris GK. Panoploscelis specularis (Orthoptera: Tettigoniidae: Pseudophyllinae): extraordinary female sound generator, male description, male protest and calling signals. Journal of Orthoptera Research. 2003;12(2):173 - 181. Available at: http://www.bioone.org/doi/abs/10.1665/1082-6467%282003%29012%5B0173%3APSOTPE%5D2.0.CO%3B2.