High-energy gamma-rays as an indirect signature of supersymmetric dark matter

Weakly-interacting massive particles may contribute a substantial fraction to the mass of our Milky Way as they may also be a major component of clusters of galaxies. Their mutual annihilations would yield several indirect signatures that are potentially detectable on Earth as extra-components to the various cosmic radiations. I will mostly concentrate here on gamma-rays and will shortly review the various strategies at hand - Cerenkov detectors or satellites - to find them. Tile clumpiness of tile dark matter distribution - that plays a key role in boosting up the various signals - will also be addressed.