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| Isaac Pérez Castillo | 2 | | | |
| Isabel | | | | 1 |
| Isabel Alcázar Díaz | 41 | | | |
| Isabel Bermejo | 2 | | | |
| Isabel Bores | 1 | | | |
| Isabel Bueno García | 3 | | | |
| Isabel Gallego | 5 | | | |
| Isabel Hermosell | 1 | | | |
| Isabel López y Carlos Bodas | 47 | | | |
| Isabel María Viruez | 46 | | | |
| Isabel Martín | 24 | | | |
| Isabel Rodríguez | 18 | | | |
| Isaka Yoji | 4 | | | |
| Ishikawa Ken | 2 | | | |
| Isidro Martínez | 1426 | 26 | | 20 |
| Ismail Alí Gago | 560 | 3 | | |
| Iván F. Dimoftache | 4 | | | |
| Ivo Antusek | 1 | | | |
| J. Mauro | | | 1 | |
| J.F. Gaffard | 4 | | | |
| J.K. Melville | 6 | | | |
| J.M. Garg | 105 | | | |
| J.P. Müller & Henle | 3 | | | |
| J.T. Williams | 7 | | | |
| Jaap Bijsmans | 1 | 1 | | |
| Jacinta Lluch Valero | 99 | | | |
| Jacobo Martín | 2 | | | |
| Jacques Prevost | | | 2 | |
| Jaime E. Jiménez | 2 | | | |
| Jaime García | | | | 1 |
| Jaime Olaizola Suárez | 2 | | | |
| Jaime Rebollo Mejía | 21 | 12 | | 1 |
| Jaime San Román | 11 | | | |
| James Keith Lindsey | 45 | | | |
| James L. Stuby | 1 | | | |
| James Lambert | | | 2 | |
| James Lynott | 10 | | | |
| James P. McVey | 1 | | | |
| James St. John | 35 | | | |
| Jamie McMillan (Drinker Moth) | 21 | | | |
| Jan Delsing | 14 | | | |
| Jan Derk | 3 | | | |
| Jan Messersmith | 36 | 1 | | |
| Janke | 1 | | | |
| Jarek Matusiak | | | 35 | |
| Jaroslaw Barski | 1 | | | |
| Jason L. Buberel | 1 | | | |
| Jaume Bobet Cortada | 18 | | | |
| Javier Ábalos Álvarez | 7 | | | |
| Javier Castellano Colmenero | 5 | | | |
| Javier Díaz Barrera | 54 | | | |
| Javier García de la Cruz | 4 | | | |
| Javier Gotor | 311 | | | |
| Javier Martín López | 13 | | | |
| Javier Miguéns | 2 | | | |
| Javier Mínguez | 17 | | | |
| Jay Vavra | 2 | | | |
| Jdiemer | 1 | | | |
| Jean Roulin | 2 | | | |
| Jean-Claude Durka | 1 | | | |
| Jean-Claude Lincker | 2 | | | |
| Jeff Kubina | 2 | | | |
| Jeffdelonge | 2 | | | |
| Jelmer Poelstra | | | 5 | |
| Jenn Forman Orth | 3 | | | |
| Jennifer Bran | | | | 1 |
| Jennifer Lentz | 2 | 1 | | |
| Jenny Huang | 6 | | | |
| Jerome Fischer | | | 2 | |
| Jerry Kirkhart | 17 | | | |
| Jerry Oldenettel | 12 | | | |
| Jerzy Strzelecki | 8 | | | |
| Jessica Louque | 1 | | | |
| Jéssica Truco Marcos | 32 | | | |
| Jesús Dorda | 1 | | | |
| Jesús Fernández Solís | 64 | | | |
| Jesús Gómez | 3 | | | |
| Jesús López Vico | 2 | | | |
| Jesús María Rodríguez Gutiérrez | 2 | | | |
| Jesús Rodríguez | 2 | | | |
| Jesús Rubio García | 24 | | | |
| Jesús Serrano | 12 | | | |
| Jeyson Bernal | | | | 1 |
| Jgad | 2 | | | |
| Ji-Elle | 10 | | | |
| Jim Conrad | 4 | | | |
| jjron | 5 | | | |
| JKL-Foto | 2 | | | |
| JMillott | 2 | | | |
| JN | 1 | | | |
| Jniemenmaa | 1 | | | |
| Joan Carles Hinojosa Galisteo | 3 | | | |
| Joan de Gracia | 1 | | | |
| Joan Quintana | 13 | | | |
| Joanne Goldby | 5 | | | |
| joanvicent | 2 | | | |
| João Coelho | 19 | | | |
| Joaquim Alves Gaspar | 46 | | | |
| Joaquím Reberté Ferrán | 2 | | | |
| Joaquínn Cea Jiménez | | | | 1 |
| Joel | | | | 1 |
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| Joel Mills | 2 | | | |
| Johan Embréus | 2 | | | |
| Johann Dréo | 2 | | | |
| Johanna Schachner | 1 | | | |
| John Campbell | 21 | | | |
| John Foxx | 2 | | | |
| John Gerrard Keulemans | 1 | | | |
| John Gould & William Hart | 3 | | | |
| John J. Harrison | 48 | | | |
| John Manger - CSIRO | 6 | | | |
| John Phillips | 2 | | | |
| John Tann | 5 | | | |
| John Walker | 26 | | | |
| Jojo | 2 | | | |
| jome jome | 27 | | | |
| Jon Sullivan | 92 | | | |
| Jonathan Zander | 5 | | | |
| Jonathon Jongsma | | | 3 | |
| Joop Trausel y Frans Slieker | 2 | | | |
| Joost van Bruggen | | | 2 | |
| Jordi Calvet | | | 17 | |
| Jordi Carceller | 46 | | | |
| Jorge A. Díaz | 5 | | | |
| Jorge Alberto González | | | | 1 |
| Jorge Andrade | 2 | | | |
| Jorge de la Calle | 5 | | | |
| Jorge Fernández Fernández | 2 | | | |
| Jorge Íñiguez Yarza | 2 | | | |
| Jorge Láscar | 20 | | | |
| Jorge Martínez Huelves | 5067 | | | |
| José Alberto Vinagrero | 9 | | | |
| José Antonio Gil Martínez | 8 | | | |
| José Antonio Luque Romero | 3 | | | |
| José Antonio Pérez Roque | 1 | | | |
| José Biedma López | 373 | | | 14 |
| José Carlos | | | | 1 |
| José Carrillo | 7 | | | |
| Jose Galea | | | | 1 |
| José González | 5 | | | |
| Jose Guardado Rock | | | | 1 |
| José Ignacio López-Colón | 177 | 3 | | |
| José Juvera | 2 | | | |
| José Lebrón Zunzarren | 20 | | | |
| José Lisón Martín | 231 | | | |
| José Luis Molina Niñirola | 68 | | | |
| José Luis Ordovás | 12 | | | |
| José Luis Portela Martínez | 250 | | | |
| Jose M. Molina | | | | 1 |
| José Manuel Benito Álvarez | 169 | | | |
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| José Manuel Osorio | 1 | | | |
| Jose Mari Aldaya | | | | 1 |
| José María Adrián Espinoza Monroy | | | | 4 |
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| José María Escolano | 54 | | | |
| José María Martín Cerezo | 7 | | | |
| José María Molina | 45 | | | |
| José Miguel Léon Ruiz | 183 | | | |
| José Miguel Martín | 1 | | | |
| José Miguel Sancho | 5 | | | |
| José Ramón Pato Vicente | 228 | | | |
| José Tortajada Millán | | | | 1 |
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| Joseph Tobias y Nathalie Seddon | | | 2 | |
| Josh More | 149 | | | |
| Joshua Stone | 4 | | | |
| Josu Joseph Martín Hurtado | 2 | | | |
| Jozef Fiala | 1 | | | |
| Juan | | | | 1 |
| Juan Antonio Iglesias | 28 | | | |
| Juan Carlos | 1 | | | |
| Juan Carlos C. N. | | | | 1 |
| Juan Carlos Gil | 12 | 1 | | |
| Juan Carlos Lanas Álvarez | 63 | | | |
| Juan Carlos Pérez Magaña | | | 1 | |
| Juan Carlos Pérez Mestre | 8 | | | |
| Juan Carlos Rico Jiménez | 2 | | | |
| Juan Castro Muñoz | | | | 1 |
| Juan Diego Muñoz | | | | 1 |
| Juan Emilio | 55 | | | |
| Juan Francisco Moreno | 35 | | | |
| Juan José Arrojo | 33 | | | |
| Juan José de la Rosa | 41 | | | |
| Juan Lacruz | 6 | | | |
| Juan Pedreros | | | | 1 |
| Juan Pedro López | 11 | | | |
| Juan R. Martínez | | | | 1 |
| Juan Rodríguez Durán | 1 | | | |
| Juan Rodrííguez Peláez | 3 | | | |
| Juan Vicente Royo | 9 | | | |
| Juanma Herrera Cordero | 2 | | | |
| Juaperez | 2 | | | |
| Julia González | 21 | | | |
| Julia Martínez García-Carpintero | 9 | | | |
| Julian Finn | 1 | | | |
| Julián J. Martínez Bañuelos | 2 | | | |
| Julianz | 2 | | | |
| Julien Renoult | 15 | | | |
| Julien Willem | 3 | | | |
| Julimux | 1 | | | |
| Julio Bretín | 3 | | | |
| Julio Cabria Ramos | 14 | | | |
| Julio César Medina Agudelo | | | | 1 |
| Julio Raso Perona | 10 | | | |
| Julio Ríos | 29 | | | |
| Julius Senegal | 1 | 1 | | |
| Jun-Fa Wong | 2 | | | |
| Justin Hall | 2 | | | |
| Justin Johnsen | 1 | | | |
| Justin Wasack | | | 1 | |
| Jörg Hempel | 4 | | | |
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| K.C. Hung | 6 | | | |
| KaiMartin | 2 | | | |
| Kallerna | 19 | | | |
| Karakal | 3 | | | |
| Karel Jakubec | 21 | | | |
| Karim Alíí Mendoza | 1 | 1 | | |
| Karl Ragnar Gjertsen | 2 | | | |
| Karl Vogt | 1 | | | |
| Karunakar Rayker | 1 | | | |
| Katja Schulz | 19 | 2 | | |
| Kelly Verdeck | 2 | | | |
| Ken Billington | 47 | | | |
| Ken Koll | 28 | 4 | | |
| Ken Thomas | 6 | | | |
| Kenny Turban | 2 | | | |
| Kevin Collins | 3 | | | |
| Kirk | 1 | | | |
| Kirsten Poulsen | 2 | | | |
| Kispál Attila | 1 | | | |
| Kk | 3 | | | |
| Klaus Stiefel | 8 | | | |
| Kok Leng Yeo | 2 | | | |
| Kolforn | 4 | | | |
| Koshy Koshy | 32 | | | |
| Kriplozoik | | | 1 | |
| Kristian Peters | 5 | | | |
| Kristina la wapa | | | | 1 |
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| KwesiRaul | 1 | 1 | | |
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| Lara Romero | 7 | | | |
| Lars Falkdalen Lindahl | 7 | | | |
| Lars Lachmann | | | 1 | |
| Lars Simonsen (Soulkeeper) | 2 | | | |
| Laslovarga | 3 | | | |
| Laura Alarcón Bellón | 20 | | | |
| Laura Collado y Javier Peraleda | 331 | | | |
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| Len Blumin | 37 | | | |
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| Lip Kee Yap | 72 | | | |
| LIRA: Laboratorio de Investigación en Reproducción Animal de la UABJO | 5 | | | |
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| Luis Alejandro Bernal Romero | 53 | | | |
| Luis Alonso | 16 | | | |
| Luis Argerich | 4 | | | |
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| Luis C. Pastor | 8 | | | |
| Luis Daniel Carbia Cabeza | 4 | | | |
| Luis Felipe García Brigido | 4 | | | |
| Luis Fernández García | 21 | | | |
| Luis García | 1 | 1 | | |
| Luis José Bellido Cruz | 1057 | 10 | | |
| Luis M. (Dingilingi) | 3 | | | |
| Luis Miguel Bugallo Sánchez | 44 | | | |
| Luis Serrano | 17 | | | |
| Luis Valverde Manchado | 10 | | | |
| Lukas Kaffer | 2 | | | |
| Luna | | | | 1 |
| Luz Elizabeth | | | | 2 |
| Luz Ramos Peña | 4 | | | |
| Lynette Schimming | 8 | | | |
| M. Betley | 5 | | | |
| M. Eugenia Sánchez Carpintero | 8 | | | |
| Macarena Álvarez Plaza | 32 | | | |
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| Maite Santisteban Rivero | 1411 | | | |
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| Malcolm Tattersall | 11 | | | |
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| Marc Plomp (Natuur Digitaal) | 5 | 4 | | |
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| Mark A. Wilson | 16 | | | |
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| Michael Dalvald | 79 | | | |
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| Patrik Åberg | | | 39 | |
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| Paul Marvin | | | 9 | |
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| Peter Boesman | | | 34 | |
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| Peter Stronach | | | 1 | |
| Peter Trimming | 1 | | | |
| Peter van Rodijnen | 1 | 1 | | |
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| Phil | 7 | | | |
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| Philippe Garcelon | 6 | | | |
| Philippe Henry | 4 | | | |
| Philippe Kurlapski | | | 1 | |
| Picotverd | 90 | 20 | | |
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| Roberto Verzo | 5 | | | |
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| Ryan Somma | 34 | | | |
| Ryszard | 28 | | | |
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| USFWS - Kristine Sowl | 3 | | | |
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| USFWS - Laura Whitehouse | 6 | | | |
| USFWS - Lawrence S. Smith | 2 | | | |
| USFWS - Lee Karney | 12 | | | |
| USFWS - LuRay Parker | 6 | | | |
| USFWS - Luther Goldman | 2 | | | |
| USFWS - Lynn B. Starnes | 2 | | | |
| USFWS - Marc P. Hayes | 1 | | | |
| USFWS - Mark R. Jennings | 3 | | | |
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| USFWS - Phil Million | 2 | | | |
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| USFWS - Richard Urbanek | 2 | | | |
| USFWS - Rob MacDonald | 4 | | | |
| USFWS - Robert Burton | 2 | | | |
| USFWS - Robert F. Scott | 2 | | | |
| USFWS - Robert Gill | 1 | | | |
| USFWS - Ron Singer | 1 | | | |
| USFWS - Ronald Laubenstein | 2 | | | |
| USFWS - Ryan Hagerty | 15 | | | |
| USFWS - Spencer Neuharth | 2 | | | |
| USFWS - Steve Hillebrand | 65 | | | |
| USFWS - Steve Maslowski | 6 | | | |
| USFWS - Steve Moore | 3 | | | |
| USFWS - Terry Tollefsbol | 2 | | | |
| USFWS - Tim Bowman | 12 | | | |
| USFWS - W. S. Keller | 2 | | | |
| USFWS - William Campbell | 6 | | | |
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