Conservation ecology of kea - Kea Conservation Trust website

31% of nests. At one of these nests one of the nestlings had previously been radio-tagged
and we recovered its carcass from a stoat den about 100m below the nest. Tooth marks
on the transmitter were consistent with stoat dentition and the dead chick’s nest-mate was
missing. In further data analyses, we include this nest as one from which the chicks
mysteriously disappeared, as this would have been the case had the chick not been radio-
tagged. At no period in the nesting cycle were nest contents particularly likely to
disappear (Fig. 4).
Figure 4. Stage in the breeding cycle at which nest contents disappeared.
Frequency
3
2
1
0
Overall nest survival
0- 10- 20- 30- 40- 50- 60- 70- 80- 90- 100- 110-
The overall daily nest survival rate excluding accidental failures was 0.995 (SE = 0.001),
equivalent to at least 57% (95% CI = 40-79%) of nests avoiding nest predation. If
accidental failure occurs at 6% of nests (see above), then the overall nest survival rate
will be 51% (95%CI = 34-73%).
Time since egg laying (days)
15