Escapee? LB Corella and Callum Brae obs

[Julian Robinson <>]

Last Friday was a bumper visit to Callum Brae with 52 species in a couple
of hours, the most I've seen at CB.  Including: 

-- 20+ Fuscous HE's (first time I've seen them at CB, inc one
young bird with yellow gape). 
-- 10+ Brown-headed HE's acting like treecreepers (been there for
a week or so; 1st time seen at CB by me)
-- 2-10 each Sittellas, Southern Whitefaces, Speckled
Warblers, Red-browed and Double-barred finches.
-- 1 White Ibis calling from a tree
-- 1 Pipit (included bec I haven't seen one there before)
-- many Dusky Woodswallows 

Also there was again a pair of Long-billed + Little
Corella occupying the same hollow for the third spring running. 
This time I noticed some kind of band or chain collar on the Long-billed
... given the recurring question as to whether out-of area birds are
escapees I was wondering if anyone would know its significance or what it
is...