This video about spadefoot toads says about itself:
Awesome toads that only come out during massive rain-storms. Found this guy sitting in the middle of the road. Released him out in a pond afterwards.
From New Scientist:
Mating toads cross the species barrier
* 17 November 2007
* From New Scientist Print Edition. Subscribe and get 4 free issues.
YOU’D think it would be a bad idea to mate with another species, but not if you’re a spadefoot toad.
Because spadefoot toads breed in temporary pools their tadpoles must race to mature before the pools dry up. When Spea bombifrons females mate with males of a quicker-maturing species, S. multiplicata, their tadpoles grow faster than if they mate with their own species.
When the pools are shallow, Karin Pfennig of the University of North Carolina at Chapel Hill found that female S. bombifrons are more likely to choose mates of the other species (Science, DOI: 10.1126/science.1146035). This behaviour suggests the female toads‘ choice of mates depends on the need for faster-developing young, says Pfennig.
Females who mate with the other species do better than non-hybrid toads even though their offspring are often sterile or produce fewer eggs.
Plains spadefoot toad ringtone: here.