I don't have any idea on species yet, I will ask next time I get more.
Considering going the 300 gal Rubbermaid route, for more, and in a more sunny area of the yard.
Under the first few inches of soil, its all rock here, so digging a pond in isn't an option, and the plethora of cane toads that would spawn in, and produce toxic tadpoles, means anything they can access, requires a side to keep them out.
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Even now the patio needs to rinsed every morning to wash off the toad feces, and at night they eat any dog food left over, and krap in its water dish. The one above is about the size of a Chihuahua.