Hay rake

Dump rake
A Molon 120 Mini side-delivery belt rake raking hay into a windrow.
Wheeled hay rake
(Click for video)
A tractor with a rotary rake forms a windrow, another one with a loader wagon follows and collects the hay for silage.

A hay rake is an agricultural rake used to collect cut hay or straw into windrows for later collection (e.g. by a baler or a loader wagon). It is also designed to fluff up the hay and turn it over so that it may dry. It is also used in the evening to protect the hay from morning dew. The next day a tedder is used to spread it again, so that the hay dries more quickly.