First of the Male Rheas is now booming

[shamorunner]

Are we supposed hear this 'booming".....
.....all I heard was a small rustle.

Turn up your volume for the 1second mark, that one is noticeably quiet. The 2nd booming at the 7 second mark is noticeably louder to a point it caused the camera to to cut out due to loudness but is still fairly noticeable but volume will still need to be high. Both boomings are deep sounds

 

[shamorunner]

'there is little info out there on male rhea interaction'

All the ratites, it seems. So much churnalism.

SE

There are a couple sources I've found that have a lot of content that contains a lot of data collection, but 2/3rds or more is on ostriches specifically which isn't much help for Emu or Rhea for in depth, I addition to also being stuck behind hefty acedemic pay walls sometimes.

The Welfare of Farmed Rattites is the best one I've found but for backyard/homesteading it is best to find a copy when someone doesn't know what they have.