The Scarecrow is a reference to a movie of the same name that came out in 2002.
Some of the scarecrow's bones are showing and it has glowing red eyes, along with a large brown hat. Its mouth is stitched shut and it wields a scythe. Occasionally, he will make a faint humming noise. Scarecrow summons a large flock of crows to temporarily stun survivors.
Scarecrow's ability is to summon an infinite flock of crows that obscure vision for survivors and decrease their speed.