From the Texas Almanac:
"Other possible threats to horny toads are pet collection, road kill and urbanization. The TPWD study concludes, however, that there is less danger from urbanization than from farming.
The tilling of the earth — plowing — shows up in the survey as suspect number one. It seems the horned lizards hibernate and lay their eggs underground during the winter and summer respectively. Plowing disturbs that process.
Also, the conservation researchers caution that in recent decades pesticides and defoliants have become more common for machine harvesting. So, they say, chemical use cannot be ruled out as also having some possible effect on the decline of the horny toad."
WE ARE FARMERS!!! FROGS DIE.