larcher,

When hnting Sambar deer in the forests, the wind goes up and down the
hillsides differently depending on what time of the day, morning or evening
PLUS which side the hillsides is facing.

Other more open areas - because of the heat you get small wind swirls
(very small non destructive tornado shape funnels that pick up dust etc)
and these can blow your scent all over the place.

500 Nitro