Which planes were spotted fighting the Alexander Mountain Fire?

DENVER (KDVR) -- With the Alexander Mountain Fire burning at over 1,800 acres as of Tuesday morning, many fire services around the state have pulled out all the stops in order to fight it.

This includes having crews on the ground as well as in the sky.

Several aircraft were spotted around the fire through Flightradar24.com, with sometimes half a dozen or more aircraft circling the fire at any given point.

Which planes were spotted fighting the fire?

Several large aircraft responded to the fire, from planes and helicopters owned and operated by private companies to a helicopter owned by the State of Colorado:

• Sikorsky Firehawk S-70i - Owned and operated by the State of Colorado
• Sikorsky Firehawk S-64f - Owned by a private company
• Boein...