Differences in reproductive success coupled with assortative mating shape hybrid zone dynamics between Saltmarsh and Nelson’s sparrows

Postdoc Jen Walsh authored a new paper in the Auk looking at the role of divergent mating strategies, reproductive success, and compatibility in maintaining the Saltmarsh-Nelson’s sparrow hybrid zone. Looking at nesting and paternity data for 342 sparrows of both pure and hybrid origin, she found that F1-F2 hybrid males…

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Even sex ratios in Saltmarsh Sparrows despite reasons to predict otherwise

Postdoc Jen Walsh co-authored a new paper in the Auk with collaborators from the University of New Hampshire looking at adaptive sex ratio manipulation in Saltmarsh Sparrows. The authors determined the sex of 990 offspring from 370 nests and characterized variation in site- and population-level sex ratios. They found no…

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Stepfanie wins major teaching award!

Congratulations to graduate student Stepfanie Aguillon for being awarded the 2018 Cornelia Ye Outstanding Teaching Assistant Award. This Cornell-wide award recognizes “demonstrated excellence and dedication in instructional responsibilities to students at Cornell University, thereby enhancing undergraduate and graduate education at Cornell.” Stepfanie has been deeply engaged in teaching evolutionary biology…

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