Just returned from Dr. Bret Tobalske’s lab at the University of Montana.  This was our first trip into the field this year.  Along with research student Emma Bloomquist we collected infrared thermography, hovering metabolic rate, evaporative water loss, and particle image velocimetry data at both high and low temperature.  We will use these data to determine 1) if hummingbirds can compensate for the loss of passive heat dissipation with evaporative heat dissipation at high temperatures during hovering, and 2) if hummingbirds can balance their heat budgets at high temperature during hovering.  We also collected data for a side project….study to see if hummingbirds can dissipate heat via their bill.  Now, on to analysis!

Bret and Emma getting ready to collect data.

Calliope hummingbird feeding at our experimental feeder.

Emma setting up the infrared camera.

Emma gathering hovering metabolic rate data.

Emma and Don getting the flight chamber ready.

Emma setting up the metabolism system.