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Transcription
proach birds and watch them closely for long periods. They
show at times a tendency to pick at wood though except round
nest entrances no sign of bark stripping is shown and it is
purely a beak exercise, I think, as generally hard wood is
selected. But it is a very minor habit, seldom indulged in,
and probably only to trim the beak when overgrowing or to
keep a sharp edge on the lower mandible which is used like
a paring knife on seeds while the seed is held and rotated
by the tongue against the upper mandible. At such times
the beak is invariably held in the notch with a gap between
the mandibles at the side and it is through this gap that the
husk of the seed is ejected as it is peeled off. When clean
the kernel of the seed is swallowed. About nesting hollow
entrances the bark is pecked and in every nest I saw a teak
tree with green or live bark was used and I believe this
habit is practised to protect the young from ant attack as
the green bark exuded a sticky sap which would probably
deter insects and it is noticeable such peck marks are not
so much stripping as wounds marks to stimulate bleeding. It
is noticeable the greatest area of pecks is always on the
lower side of the nest and a much narrower margin of pecks
is seen on the sides and upper side. Marks appear to be made
at various times and not all at one time. Such pecking about
nests is not invariable, many nests showing no signs of it,
but it was noticeable that where peck marks were present
there were invariably ants passing up and down the tree and
apparently giving the pecked area a wide berth. Other habits
noticed were the more or less daily regular movements between
roosing places and different feeding and resting areas during