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The tadpoles of the Puerto Rican crested toad — also called the sapo concho — are expected to bolster the critically endangered population of the only toad native to the Caribbean island.

The tadpoles of the Puerto Rican crested toad — also called the sapo concho — are expected to bolster the critically endangered population of the only toad native to the Caribbean island.

The tadpoles of the Puerto Rican crested toad — also called the sapo concho — are expected to bolster the critically endangered population of the only toad native to the Caribbean island.