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Funnelwebs are by nature ambush predators
(lying in wait inside their funnels).
They tend to use "trip lines" radiating from
the entrance to their tunnels in order to feel the presence of prey.
They do not use not enmeshing
webs.
To the best of my knowledge, they do not
"truss their prey" in the manner described.
Yes, they do wander around, especially after
rain, esp. if their burrows get flooded.
That's how and when most human bite
incidents occur.
There are more species of Funnel-webs than
generally realised, however the Sydney Funnel-web and a Northern Tree Funnel-web
are the main species to cause concern.
The
Black House Spider is not related, but is much more common.
Cheers
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