The listing, Northern Territory Australia Covers has ended.
1st pic....First Day of Issue: Wedge Tailed Eagle, Post marked Crows Nest, 19 Jun 1976
Next 2 pics....2 envelopes showing front and back.
4th pic is the next 2 envelopes.
5th pic is the last of the 6 1/2" x 4 1/2 inch envelopes.
Last picture is of the 2 8 1/2 x 4 1/2 envelopes.
Information on each of the birds is on the back of the envelopes. You can see this in Picture 3.
Postage is going to be charged on this as it will be sent priority with delivery confirmation.