Bennu heron
The Bennu heron (Ardea bennuides) is an extinct, very large heron from what is now the United Arab Emirates at the eastern end of the Arabian Peninsula. Background

Found in 1977, remains of the heron have been dated to 2700–1800 BCE, coinciding with the Umm al-Nar period. Based on remains discovered, it was approximately  tall and had a wingspan up to , thus surpassing the size of the largest living species in the heron family, the goliath heron. It may have been the inspiration for the Bennu deity in Egyptian mythology, hence the specific name. Extinction 
It has been speculated that the Bennu heron went extinct because of wetland degradation. Another likely cause of their extinction would be humans overhunting their population. References 

Bennu heron
Bennu heron
Birds of the Arabian Peninsula
Extinct birds of Asia
Holocene extinctions
Bennu heron
Fossil taxa described in 1977