hmmm.....wiki hasn't gone for the 'rat element' in relation to ADELE island...they've gone for the 'lesser frigate bird' for some reason:

https://en.wikipedia.org/wiki/Adele_Island_(Western_Australia)

and now I can see where Clacton petshop were coming from..."as good as" eh...the birds to be found on adele island....along with a Johnson in-sect....