Sorry for the late reply but we have been on the road to Spain...
Just in case you didn't solve the crossword clue introducing the Hawaiian Goose it's also the Nene (pronounced Nay-nay for the bird and rhyming with either 'hen' or 'seen' depending where you live for the river part of the clue)
Thanks for faving the goose - really appreciated Nienke...
...please do keep on watching???