Loading…
Attending this event?
Welcome to the interactive web schedule for the 2019 Midwest Fish & Wildlife Conference! The schedule is subject to change (as of November 7, 2018). Please check back for updates. To return to the main Conference website, go to: www.midwestfw.org.

TIPS FOR NAVIGATING THIS SCHEDULE:
The conference schedule is hosted in SCHED which allows you to search within the schedule, and filter the schedule to show items only occurring on a certain date or within a track/symposia.
  • To view only a certain type of presentation or track, locate the heading "Filter By Type" in the navigation bar. As an example, try clicking on "T01: Fisheries: Great Lakes I".
  • The default view for the schedule is "Simple" which only shows the start time and title of the agenda item. Hover over the button that says "Schedule" to see the different view options. The "Expanded" option will show start and end times, room location, and session description, if there is one.
  • You can build your own schedule by creating a free account with SCHED by selecting "SIGN UP." Watch the "how-to" video to learn more about using Sched. 
  • PLEASE NOTE: Adding agenda items to your schedule through this app does not sign you up for a session. If an agenda item says "pre-registration required" or charges an additional fee, you need to add the item to your registration through the online registration system

View analytic
Monday, January 28 • 3:20pm - 3:40pm
(SYMPOSIA-05) Forty Years of Bird-building Collisions Shed Light on the Evolutionary Dynamics of Bird Migration in a Rapidly Changing World

Sign up or log in to save this to your schedule and see who's attending!

AUTHORS: Benjamin Winger, University of Michigan; Brian Weeks, University of Michigan; David Willard, The Field Museum

ABSTRACT: Global warming is hypothesized to cause reductions in animal body size. Migratory birds are particularly vulnerable to change because they breed at high latitudes where temperatures are changing most rapidly, their morphologies are constrained by the demands of migration, and they are dependent on fluctuating seasonal resources and climatic conditions throughout their annual cycles. We analyzed morphological change for 52 species of migratory birds from 1978-2016, using measurements of 70,000 specimens that died from building collisions during migratory passage through Chicago, IL. Across species, we found a consistent decline in body size and consistent increase in wing length. Body size declines are linked to increasing summer temperatures on the breeding grounds: years with high summer temperature yielded birds with smaller body size. Increases in wing length are driven by selection during the migratory period, which we hypothesize is due to compensatory selection for efficient flight to maintain migratory journeys in the face of shrinking body size. The species composition of the Chicago collision data we analyzed also yielded insights into the relevance of avian social behavior for understanding the negative impacts of artificial light on birds during nocturnal migration.

Monday January 28, 2019 3:20pm - 3:40pm
CENTER STREET ROOM B

Attendees (2)