There is an African plain, there are trees, grasses, some seasonal rivers/lakes, and snakes.

Upon the plain lives a society of tribesmen (think along the lines of the [Maasai Mara](https://en.wikipedia.org/wiki/Maasai_Mara) people)

[![enter image description here](https://l7.alamy.com/zooms/5e1e3bdb36f9477cbb4c5d1f00c5a17b/kenya-narok-district-maasai-men-walk-home-across-the-short-grassy-bfmrj0.jpg)](https://l7.alamy.com/zooms/5e1e3bdb36f9477cbb4c5d1f00c5a17b/kenya-narok-district-maasai-men-walk-home-across-the-short-grassy-bfmrj0.jpg)
[This image used with permission: Source (Alamy)](http://www.alamy.com/stock-photo/masai-mara-tribe.html)

These tribes love life, but hate snakes - they are the embodiment of the evil spirits, they cannot be eaten, they also cannot be killed (life is more treasured than evil is hated).

Of course, there's plenty of snakes around.

So the question (obviously) is how can the tribesmen get the snakes off the plain?
['https://worldbuilding.stackexchange.com/questions/72475', 'https://worldbuilding.stackexchange.com', 'https://worldbuilding.stackexchange.com/users/-1/']
Just ask Moses
==============

From [Artapansus of Alexandria](https://en.wikipedia.org/wiki/Artapanus_of_Alexandria) in his History of the Jews: 

> 
> Jealousy of Moses' excellent qualities induced Chenephres to send him
>  with unskilled troops on a military expedition to Ethiopia, where he
>  won great victories. After having built the city of Hermopolis, he
>  taught the people the value of the ibis as a protection against the
>  serpents, making the bird the sacred guardian spirit of the city...
> 
> 
> 

Behold, your savior
===================

[![enter image description here](https://i.stack.imgur.com/TbKjq.jpg)](https://i.stack.imgur.com/TbKjq.jpg)

Your people worship the Ibis
============================

Not only are [Sacred Ibis](https://en.wikipedia.org/wiki/African_sacred_ibis)' great for keeping around and eating snakes, they are also native to the same plains that the Masai Mara live on, and they are [easy to worship](https://en.wikipedia.org/wiki/Thoth) too!

[![enter image description here](https://i.stack.imgur.com/rWMQ1.jpg)](https://i.stack.imgur.com/rWMQ1.jpg)
> 
> Kookaburra roams through the plains with glee, eating all the snakes
>  with a grin is he, laugh, Kookaburra laugh, Kookaburra full your stomach
>  must be.
> 
> 
> 

The humble Kookaburra! <https://en.wikipedia.org/wiki/Kookaburra>
A less well known Australian bird who loves to eat snakes and small rodents (solves two suspected problems here!!) 

My only problem would be that they would usually nest in a tree, so if there are no suitable trees around, we may have to make a hybrid kingfisher-kookaburra breed which would use the habitat of the kingfisher which is small holes in sand-mounds.