fussel wrote: ↑November 27th, 2022, 10:03 pm
How is it that in this area the transmitted temperatures differ significantly from those given in the climate tables???
Hi Fussel
The temperature measured by the transmitter is
not the bird's body temperature,
neither the ambient temperature.
It is the temperature of the transmitter (measured inside the transmitter), and is therefore determined by: the ambient temperature + (eventual) direct exposure to sun rays (radiant heat) + the body temperature of the bird.
For example, if the ambient temperature is 20°C and the bird has a normal body temperature of 40°C, the temperature measured inside the transmitter will be in between.
If the bird (the transmitter) is exposed to direct sun radiation, the temperature of the transmitter can rise very high.
And when a bird perished, the temperature of the transmitter will drop much more than usual at night. (It takes on the ambient temperature and is no longer heated by the bird's body)
(With leg-mounted transmitters, it is different, less clear).