Designed for safety:
Over 30 years have guided development of kiwi leg-bands that are safe and reliable for this unique group of birds.
Mortality sensing indicates when a kiwi has not moved for several hours, which means you do not have to disturb a live kiwi. However, if it is dead you can move in quickly which can dramatically improve the evidence for cause of death. Moreover, the Time Since Death option provides a series of beeps that tells you how many days since the tag was still.
For some species there are even more sophisticated firmware options to help establish the start and end of incubation and even alert the tracker to a deserted nest. Please note these are very species/project specific and need to be discussed in detail for them to be appropriate for the study.