Overthink over the serpent-eagle

 So low, there must be something that had caught the attention of the Crested Serpent-eagle, perhaps something stirred up by the grass cutter just metres away.

And then the nictitating membrane came on, perhaps something in the air simply got to the eyes, as this membrane do turn on too to protect the eyes from dust and grit.

 

And then an alert pose

But to my surprise it merely flew closer to the grass-cutter, watching, watching, watching ...

... and anti-climax, as it fled when the grass-cutter stopped work suddenly to walk towards it.