Human implicit biases towards visually appealing and familiar stimuli are well documented and rooted in our brains’ reward systems. For example, humans are drawn to charismatic, familiar organisms, but less is known about whether such biases permeate research choices among biologists, who strive for objectivity. The factors driving research effort, such as aesthetics, logistics and species’ names, are poorly understood. We report that, from 1965 to 2020, nearly half of the variation in publication trends among 293 North American male passerine and near-passerine birds was explained by three factors subject to human bias: aesthetic salience (visual appeal), range size (familiarity) and the number of universities within ranges (accessibility). We also demonstrate that endangered birds and birds featured on journal covers had higher aesthetic salience, and birds with eponymous names were studied about half as much as those not named after humans. Thus, ornithological knowledge, and decisions based thereon, is heavily skewed towards fancy, familiar species. This knowledge disparity feeds a cycle of public interest, environmental policy, conservation, funding opportunities and scientific narratives, shrouding potentially important information in the proverbial plumage of drab, distant, disregarded species. The unintended consequences of biologists’ choices may exacerbate organismal inequalities amid biodiversity declines and limit opportunities for scientific inquiry.

20 Mar 2025·Behavioral Ecology

Close encounters: behavioral responses of migrating songbirds to the perceived risk of predation

Author: Cohen, Emily B ; Lindsay, Andrea M ; DeGroote, Lucas W ; Nemes, Claire E

AbstractMigrating birds face competing pressures to travel as quickly and efficiently as possible while minimizing the risk of predation en route. Despite the potential importance, antipredator behaviors in migrating songbirds have been little studied relative to time and energy tradeoffs, even as humans have introduced novel predators including free-roaming domestic cats (Felis catus) across the globe. Birds confronted with predators during stopover can employ antipredator behaviors to reduce their immediate mortality risk, but doing so may slow refueling or impose other costs that influence migration. We captured migrating Gray Catbirds (Dumetella carolinensis) and exposed them to either a live cat, model hawk, or non-predator control in an aviary experiment to assess their behavioral responses. Birds moved lower after exposure to a model hawk but showed no significant behavioral changes in response to a cat, though we observed substantial individual variation in responses. After release, we monitored activity levels of a subset of tagged individuals via the Motus Wildlife Telemetry System. Post-release activity level did not differ between treatment and control groups, indicating that brief predator exposure did not exert a persistent effect on this behavior. The lack of overall responses to the cat may reflect birds navigating the tradeoff between antipredator behaviors, which are costly during migration, and reduction of predation risk. However, it could also indicate naïveté of young birds to this introduced predator, which may increase vulnerability to predation during migration. We encourage further investigation of the influence of prolonged or repeated exposure to domestic cats on songbird behavior and physiology, and ultimately migration success.

18 Mar 2025·The Journal of the Lepidopterists' Society

Life Histories and Conservation Matters of Stiriini (Noctuidae: Stiriinae) from the American Southwest

Author: Wikle, David L. ; Wagner, David L. ; Nall, Berry ; Keegan, Kevin L.

100 Deals associated with Carnegie Museum of Natural History

100 Translational Medicine associated with Carnegie Museum of Natural History

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