Data from: Characteristics of Narcondam Hornbill Rhyticeros narcondami nest trees

The global distribution of the Narcondam Hornbill is restricted to the
small Narcondam Island spread over an area of 6.8 sq. km in the Andaman
Sea. In this study, we describe the nest site characteristics, and
abundance of the Narcondam Hornbill nest tree species based on 33 nests
(active and potential) that we observed during our study period. We
describe nests that we found in 13 tree species including some species
which have not been reported in the past literature. The nest trees varied
in girth from 103 – 380 cm, and the nest height varied from 4 – 31 m.
Abundance of most of the nest tree species was highest in the low (0 – 200
m above mean sea level (ASL)) and mid (200 – 400 m ASL) elevations. The
overall density of large trees decreased from lower to higher elevations
pointing towards potential reduced nesting opportunities in higher
elevations. While more than 57% of cavities were between north-west and
north-east facing, 21% of the cavities were south-west and west facing. We
have also compiled the list of known Narcondam Hornbill nest tree species
based on this and previous studies.