Approx. 14" x 23"  bark ochre painting by Bulamb.   Fish, Egret and tribal hatching and design.   A couple splits at bottom.
 
Note on Back:
 
Artist Bulambi
Tribe Narrakaza
Subject Warratj the reef
Indigenous Australian/Warramirri
  Elcho Island, NT, Australia
 
Possibly an eastern reef egret?   About the artists tribe:   The Warramiri is a large seafaring Yirritja clan. The clan homeland is between Barrkira and Maṯamaṯa. However, most clan members live on Galiwin’ku (Elcho Island) and in the Miwatj region. They also own the Wessel Islands. The Warramirri people speak Djaŋu.