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They can be bought from online sources, or you can catch your own.
I've known Desert Horned lizard keepers to catch their own but most (me included) prefer to buy them.
Most suppliers send them in a can with a vented lid that is easily stored.
Once you get them home feed and water them.
Then the best way to keep them is in the door of the refrigerator at 45-50 degrees Fahrenheit.
This keeps them sleeping in hibernation and they will stay alive in this state for up to 3 months.
Don't let their temperature get below 40 degrees or they will die.
The neat thing about this technique is that you can shake a few at a time into your Horny Toads habitat without risking a painful bite.
They are also much easier to dust when you aren't fighting to keep them in the bag.
As the ants warm up in the habitat they start to wiggle and move around.
This signals the horned lizards that it is supper time and the movement encourages them to eat.
If they have gobbled them all up in a few minutes and are looking for more, just shake a few more in.
Just don't put too many in at a time because they can attack and even kill a Horny Toad.
If a Horned Lizard is attacked in his natural habitat he easily outruns the ants, but in an enclosure he can't do that.
An adult Desert Horned Lizard will eat 30-60 harvester ants 3 times a week.
I like to let the ants wake up and get warm every 10 days or so.
I feed them and give them water to keep them nutritious and hydrated for the lizards.
Feed Harvester Ants bits of dark leafy greens, veggies and little pieces of fruit.
Feed tiny amounts at a time and give the ants a chance to eat it all.
If you put them back in the refrigerator with uneaten food in the container it will spoil, mold, and kill the ants.
After seeing to their needs and making sure they are still alive just put them back into the refrigerator.
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