3DLOFT wrote: ↑Tue Mar 14, 2023 12:57 pm
So these two are up for the task,
Sounds like a great research experiment,
3DLOFT
Theoretically, a dark surface absorbs more light & heat from the surrounding than a light surface - so should expect the
surface temperature to be higher/warmer in the dark bird.
However, feather is also a very good insulator.
Assuming that the metabolic rate (body heat generation) of both birds are the same, and the physical structure of the feathers are the same (same thickness, same proportion of down feathers, same number of total feathers), then any difference in
surface temperature is due to the different heat absorption properties of the different colours.
However, if the metabolic rate of the birds cannot be determined, and the physical feather structures of the birds cannot be accurately factored, then the
Heat Retention Capacity of the feathers could be a better indicator for comparison.
[Heat Retention Capacity] =
[Body Temperature of the Bird] -
[Surface Temperature of the Bird's Feather]
1) Measure each bird's Heat Retention Capacity when they return from their flight.
This gives the
Flight Heat Retention Capacity
2) As a control, when both birds are rested and fed, put both birds in a cage out in the sun for about the same duration as their flight time and then remeasure their Heat Retention Capacity.
This will give the
Baseline Heat Retention Capacity.
3) Any difference between the
Flight Heat Retention Capacity and the
Baseline Heat Retention Capacity will give you the
Efficacy of the bird's feather.
4) You then compare the Efficacy of Dark Feather versus the Efficacy of Light Feather for statistical significance, or significant difference.
Your experiment results could potentially be top notch material for publication in scientific journals,
3DLOFT