The moon goes through eight standard lunar phases. Each phase allows a different portion of the moon to become observable. Residents of the northern and southern hemispheres see a different portion of the moon during each lunar phase. In the northern hemisphere – where I live – the moon is called waxing, if the left side of the moon is dark. The right side is the light part and growing towards a full moon.
Any moon that appears more than half lighted but less than full is called a gibbous moon. 51 to 99 percent of the moon will be visible during the waxing gibbous moon phase.
And by the way, this was one of my first shots I made with my Sigma 120-400mm F4.5-5.6 DG OS HSM.
Sigma 120-400 mm [400 mm; f/19 @ 1/45, ISO 200]