This is a composite character. In the centre is a pictograph of a great cormorant. Then, the noun great cormorant is surrounded by the glyphs which mark the beginning and the end of an area. A
space in which a great cormorant was confined would be an aviary.
Illustrative Text Reference:
Chanhu-daro: Seal: The Cleveland Museum of Art: The J. H. Wade Fund 1973.160: http://www.clevelandart.org/art/1973.160: Accessed: 26 February 2018.
There is only one extant example of this Indus sign.