An agricultural harvesting head for an agricultural harvester comprising: a left frame section; a center frame section; an upper left link pivotally coupled to the left frame section at a distal end of the upper left link and pivotally coupled to the center frame section at a proximal end of the upper left link; a lower left link pivotally coupled to the left frame section at a distal end of the lower left link and pivotally coupled to the center frame section at a proximal end of the lower left link; a right frame section; an upper right link pivotally coupled to the right frame section at a distal end of the upper right link and pivotally coupled to the center frame section at a proximal end of the upper right link; and a lower right link pivotally coupled to the right frame section at a distal end of the lower right link and pivotally coupled to the center frame section at a proximal end of the lower right link, characterized in that each of the left frame section, the center frame section, and the right frame section supports a corresponding endless belt conveyor (130, 134, 132); that each endless belt conveyor (130, 132, 132) comprises an endless belt and at least a proximal roller and a distal roller about which the endless belt recirculates; that the proximal roller of the conveyor of the left frame section rotates about an axis of rotation that is collinear with a pivot axis about which the left frame section is constrained to pivot with respect to the center frame section; and that the proximal roller of the conveyor of the right frame section rotates about an axis of rotation that is collinear with a pivot axis about which the right frame section is constrained to pivot with respect to the center frame section. a left frame section; a center frame section; an upper left link pivotally coupled to the left frame section at a distal end of the upper left link and pivotally coupled to the center frame section at a proximal end of the upper left link; a lower left link pivotally coupled to the left frame section at a distal end of the lower left link and pivotally coupled to the center frame section at a proximal end of the lower left link; a right frame section; an upper right link pivotally coupled to the right frame section at a distal end of the upper right link and pivotally coupled to the center frame section at a proximal end of the upper right link; and a lower right link pivotally coupled to the right frame section at a distal end of the lower right link and pivotally coupled to the center frame section at a proximal end of the lower right link, characterized in that each of the left frame section, the center frame section, and the right frame section supports a corresponding endless belt conveyor (130, 134, 132); that each endless belt conveyor (130, 132, 132) comprises an endless belt and at least a proximal roller and a distal roller about which the endless belt recirculates; that the proximal roller of the conveyor of the left frame section rotates about an axis of rotation that is collinear with a pivot axis about which the left frame section is constrained to pivot with respect to the center frame section; and that the proximal roller of the conveyor of the right frame section rotates about an axis of rotation that is collinear with a pivot axis about which the right frame section is constrained to pivot with respect to the center frame section.