I will make a suggestion of Common Diving Petrel. 
 
Philip
 
From: Birding-Aus
[ On Behalf Of Geoff Shannon
Sent: Sunday, 24 February, 2019 2:15 PM
To: <>
Subject: [Birding-Aus] Help please,seabird
 
 
 
On evening 5/2/2019 I picked up a small seabird dead less
than 24 hours but beginning to smell.
Rubicon Estuary beach, Hawley Beach , just 10 km east of Devonport
NW Tasmania .
 
 Weight 77g , damp but no fat at all,
Wing length 160 mm and tail 60 mm bill length 27 m , skull
may have been bit squashed .
 
I have no idea so any suggestions gratefully received