Adults can attain a maximum length of 9 centimeters (nose to tail). They are often an olive-green or brown color, and have a dark patch located behind the eyes. The rear legs of frogs frequently exhibit bands or stripes of a deeper color. The backs of several of the individuals show a variety of irregular black patterns. There is a huge variety of variation in coloration; individuals with yellow, pink, red, orange, and even black fur are frequently reported to our Wildlife Information Service.
The spawning season begins in the early spring and can begin as early as the month of January in the southern regions of Britain. It can take tadpoles up to sixteen weeks to grow back legs, and then another sixteen weeks to grow front legs, before they transform into tiny frog lets and are ready to emerge from the water in the early summer (often June, but in some ponds this may be as late as September).
"Mature" tadpoles are barely speckled with a gold/brown coloration, which differentiates them from the black tadpoles of the common toad. Tadpoles of the common toad are completely solid black. Slugs and snails make up the majority of a common frog's diet, although they also eat other types of invertebrate food. Because of this, they are of great use to gardeners.