Police constable around the back of Bourke has concern about island animals (9)

'island animals' is the definition.
The answer and definition can be both animals as well as being plural nouns.
Maybe there's an association between them I don't understand?

'police constable around the back of bourke has concern' is the wordplay.
'police constable' becomes 'pc'.
'around' is an insertion indicator.
'the back of' suggests the final letters.
'has concern' becomes 'caries' (I can't justify this - if you can you should give a lot more credence to this answer).
The last letter of 'bourke' is 'e'.
'pc' enclosing 'e' is 'pec'.
'pec'+'caries'='PECCARIES'

'about' is the link.

Can you help me to learn more?