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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Thick-billed parrots -- long ago (1 Viewer)

Keep a check on pine cone crops. Best chance of an invasion would be a heavy crop in Arizona, combined with a crop failure in Durango / Chihuahua.

As pine cones take around 18 months from pollination to maturity, it should be possible to have a year's advance notice of possible invasions.
 
Even if their was a natural stray to the USA, it might be really hard to get the record accepted as genuine (and the species just seems to rare to really who up in mass, at least for now)
 
Did Thick-billed Parrots ever breed in Arizona? If they were only ever irruptive, I suppose it shouldn't be a surprise that the introduction failed, regardless of what caused the individual deaths.
 
Apparently yes, they were breeders in Arizona, although I think it's been something like a hundred years since they have done so regularly.
 
No, that project failed, in part at least thanks to the too eager ministrations of the local goshawks.

I seem to recall in the ABA's Birding mag that it was mainly captive bred/confiscated pet birds that were released and that they failed to feed on natural pines and kept returning to aviary for food and would perch up on the tops of trees and so became prime candidates for Goshawk predation.

Ian
 
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