It is certainly a male megachilid bee, but the photos do not show the foreleg which might have allowed firm identification. Male Megachile ferox have antennae that are noticeably expanded at the tip and do not have a third white band on the abdomen. The bands that are present are broken in the middle. Another hint comes from the way the wings are held after alighting, which is typical of leaf-cutter species like M. maculariformis and infrequently seen with resin bees like M. ferox.