43-39444 SU*J, UNNAMED
Based on research of missions flown by this ship and the other aircraft identified in the photo, This picture was taken either 15 April 1945 or 25 April 1945.
An interesting detail, 43-39444, a 544th ship, has no squadron number at the apex of the triangle.
Other ships identified in the picture are: 42-97027, SWAMP ANGEL below the right wing of 43-39444; 43-48501, SWEET CHARIOT below the tail of 43-39444; 44-6592, STARDUST below 43-38501.
Photo is courtesy of Charles Eliott Mac Neill, 7 January 2015.