The  Brown  Thornbill,  Acanthiza  pusilla,  is  a
common, active little bird which is often hard to see. As  it
forages  through the leaves of trees and shrubs for  insects,
it  rarely  stays in one spot for more than  a  few  moments.
Unless  it  is  seen a close range, it can be  a  problem  to
separate it from other small brown birds such as the Striated
Thornbill.  Brown  Thornbills join  other  species  in  mixed
feeding  flocks.  As  these move through  the  foliage,  each
species feeds in its own manner. The small area through which
a  Brown Thornbill travels in search of food remains its home
territory  for life. Marked birds known to be  11  years  old
have  been re-captured several times, never having moved more
than  a few hundred metres from where they were first caught.
The  nest is a domed structure with a side entrance near  the
top. Three eggs is the normal clutch but often cuckoos and an
egg. Brown Thornbills are quite good mimics, an ability often
seen when the bird is under stress.

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