Hi Barbara,
I would suggest that the risk of abandonment from
doing some protective work, provided you don't take a long time, is small. I had
these birds breeding in my yard a few years ago and they were not disturbed by
my presence. Even though on three nestings, I only found the actual nest on the
day the chicks fledged but I knew they were in there somewhere. Students &
staff at ANU have been studying them for years and banding them, including
checking nests. We had a talk at COG within the last year I think, about the
vocalisations used by WBSW in this situation. The risk of predation is very
high. I would try using chicken wire if you have it. Small enough to stop
Currawongs and big enough to let little birds through.
Philip
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