linguistic:translation
In amphibians and reptiles

Many amphibians have annual breeding seasons with male–male competition. Males arrive at the water's edge first in large numbers, and produce a wide range of vocalizations to attract mates. Among frogs, the fittest males have the deepest croaks and the best territories; females select their mates at least partly based on the depth of croaking. This has led to sexual dimorphism, with females larger than males in 90% of species, and male fighting to access females. Spikethumb frogs are suggested to engage in male-male competition with their elongated prepollex to maintain their mating site. The prepollex, which serves as a rudimentary digit, contains a projecting spine that may be used during this combat, leaving scars on the heads and forelimbs of other males.