Scarlet Tanagers are medium-sized songbirds with fairly stocky proportions. They have thick, rounded bills suitable both for catching insects and eating fruit. The head is fairly large and the tail is somewhat short and broad.
They spend much of their time skulking among the wide leaves of deciduous trees in the forest canopy, where they are hard to see. They sing a burry, rambling song and give a distinctive, harsh chick-burr call.