2025 Midwest Fish & Wildlife Conference

AUTHORS: Wendy Dorman, University of Illinios Urbana Champaign
Michael P. Ward, University of Illinios Urbana Champaign
Kirk Stodola, Illinois Natural History Survey

ABSTRACT: While many studies state that they expect birds in North America to shift their ranges north, little attention has been paid to which species will move and the mechanism by which ranges shift. Extralimital occurrences involve individuals occurring outside of their species’ core breeding distribution. The probability of extralimital occurrences may be used to infer the potential of a species to expand their range, while the location of extralimital occurrences could indicate potential areas where the range may expand. Combining eBird data, spatial modeling, and pattern analysis, I investigated range plasticity via extralimital occurrences of migrants north of their breeding distributions in the Midwest. Using dynamic occupancy modeling we predicted the likelihood of a given species to expand its range into particular areas and examined the relationship between predicted colonization and realized range shifts. We will discuss the potential for these metrics to be incorporated into an index of range plasticity.

AUTHORS: Lauren C. Scopel, Illinois Natural History Survey; T.J. Benson, Illinois Natural History Survey; Maximilian L. Allen, Illinois Natural History Survey; Kirk W. Stodola, Illinois Natural History Survey

ABSTRACT: Wildlife face increasing threats from a variety of anthropogenic sources, yet wildlife research, monitoring, and conservation funding is increasingly at risk. Wildlife managers thus face pressure to become more efficient, reducing time available for long-term survey efforts. One potential way to complement existing surveys is the use of publicly available federal or citizen science data. We integrated data from the Illinois Department of Natural Resources (IDNR), the Breeding Bird Survey (BBS), and eBird to analyze the distribution of Northern Bobwhite (Colinus virginianus) and Ring-necked Pheasant (Phasianus colchicus) in Illinois between 2010-2022. We used dynamic occupancy models and Bayesian methods to track long-term changes for each species, while also examining potential bias in sampling design for each survey type. Bobwhite and pheasant occupancy declined over the 13-year period and were negatively associated with urban land cover. Of the three surveys, IDNR had the greatest detection rates for both species, whereas eBird detection rates were lowest, especially for bobwhite. eBird data, unlike the other data sources, also showed a bias in sampling effort, where users preferentially surveyed urban and wetland areas relative to their occurrence in the state. Our results indicate that intensive monitoring should continue for gamebirds in Illinois, given their ongoing declines. BBS and eBird data can complement high-quality IDNR data, but eBird data especially need additional treatment during analysis to ensure more accurate occupancy estimates.

AUTHORS: Sarah W. Kendrick, U.S. Fish and Wildlife Service; Nicholas J. Bayly, SELVA: Investigación para la Conservación en el Neotropico; Ernesto M. Carman, SELVA; María de la Paz Irola-Angulo, SELVA; Yuly Caideco-Ortiz, SELVA; Stuart Mackenzie, Birds Canada

ABSTRACT: Many migratory landbird species are in steep decline and research to co-produced research to identify limiting factors and address threats across the full annual cycle for targeted recovery remains vital. Funding conservation efforts and research is another challenge for many that requires thinking outside the box. Recent tracking projects across the Western Hemisphere with international bird-conservation partners have been crowdfunded by Missouri birding organizations. Funding support was matched by state and federal agencies to fill knowledge gaps for declining songbird species of conservation concern across the Midwest and eastern U.S., including Golden-winged Warbler and Wood Thrush. Motus-tracking projects have allowed for new data on migration timing and departure dates, migratory routes, and survival at different periods of the full annual cycle. The Range-wide Wood Thrush Motus-tracking Project has engaged over 60 partners across 25 U.S. states and 7 countries via state agencies and international partners, resulting in the largest Motus-tagging project to date across the species’ full annual range. By utilizing the Motus network and leveraging funding and collaboration through partner projects including non-traditional, or often overlooked, audiences, we can build a stronger study design, ownership of the work, greater probability of conservation actions using the findings, and sense of community across the hemisphere for our shared migratory birds.

AUTHORS: Kristen M. Heath-Acre, Sarah W. Kendrick, Nicholas J. Bayly

ABSTRACT: The Motus Wildlife Tracking System is an international, collaborative network of automated telemetry towers that help track the movements of wildlife for conservation research. The Missouri Department of Conservation (MDC) established its first Motus receiver in 2018; since then, MDC has expanded its network to 40 stations across the state and plans to grow further. The initial goal was to create “digital fences” statewide to capture large scale movements of tagged migratory birds to fill knowledge gaps in the full annual cycles of birds of conservation concern. In the past 5 years, the Missouri Motus Network has detected 48 species of birds and has become a leader for Motus in the Midwest and the Mississippi Flyway. The Missouri Department of Conservation has also established partnerships with state, federal, and non-governmental agencies as well as international partners to tag, track, and investigate the survival, movements, migration timing, and stopover habitat of several species of migratory birds that breed or migrate through Missouri annually, including the rapidly declining Cerulean Warbler (Setophaga cerulea). Investigation into Cerulean Warbler winter survival and habitat use has revealed that Cerulean Warblers make within season winter movements, have differing habitat preference between males and females, and have relatively high overwinter survival. These data can be used to direct further research and inform full life cycle models. In addition to monitoring movements at regional and hemispheric scales, MDC has leveraged the Motus network to track and analyze local movements and survival of a reintroduced population of Brown-headed Nuthatches (Sitta pusilla) in the Missouri Ozark Highlands. Results from these analyses can help conservation partners better target management actions to protect and reverse declines of at-risk species at both local and hemispheric scales.