Private landowners manage many rare species' habitats, yet research on their responses to species conservation legislation is scarce. To address this need, we examined private landowners' responses to the listing of the Preble's meadow jumping mouse (Zapus hudsonius preblei) as threatened under the U.S. EndangeredSpecies Act (ESA). We mailed a questionnaire designed to measure these responses to a sample of landowners. The adjusted response rate was 46% (n = 379). The questionnaire asked landowners whether they had managed their land to improve the Preble's habitat and to minimize the chance of the Preble's living on it. We also asked whether landowners had or would allow a survey for the Preble's on their property. We hypothesized that landowners would respond to these questions based on their aesthetic preferences, economic concerns, information sources, parcel size, personal values, recreation activities, residence status, social influences, and other factors. Listing the Preble's under the ESA does not appear to have enhanced its survival prospects on private land. In terms of hectares owned, for example, the efforts of landowners who reported they had sought to help the Preble's (25%) were canceled out by the efforts of those who sought to harm it (26%). Moreover, the majority of respondents had not or would not allow a biological survey (56%), thus preventing the collection of data for conserving the species. All eight hypothesized determinants significantly predicted responses to the listing when they were considered individually. When considered simultaneously, however, only one economic consideration (dependence on agriculture), recreation activity (consumptive), and social factor (distrusting government), and select information sources (conservation and social), and personal values (valuing nature, valuing local control, and denying landowner responsibility) remained direct determinants. To promote the conservation of rare species by private landowners, we recommend communicating information through social networks, alleviating landowners' economic concerns, increasing use of collaborative processes, and institutionalizing assurances that landowners will not be harmed by managing their land to help rare species.Respuestas de Terratenientes a un Listado Relacionado al Acta de Especies en Peligro y Sus Implicaciones para Promover la Conservación Resumen: Propietarios privados manejan el hábitat de muchas especies raras, sin embargo son escasas las investigaciones sobre sus respuestas a la legislación sobre conservación de especies. Para atender esta necesidad, examinamos las respuestas de propietarios privados a la inclusión del ratón de Preble (Zapus hudsonius preblei) en la lista de especies amenazadas según el Acta de Especies en Peligro (AEP) de E.U. A. Para medir estas respuestas, enviamos por correo un cuestionario a una muestra de terratenientes. La tasa ajustada de respuesta fue 46% (n = 379). El cuestionario le preguntaba a los terratenientes si habían manejado sus terrenos para mejorar el hábita...