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 ; that each endless belt conveyor 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 ; that each endless belt conveyor 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 . <EOS>