Complex sentence: Some large ground-feeding birds, such as Currawongs, Magpies and Ravens will dig out newly established colonies after the queen has found a suitable spot to nest, since small domes of excavated soil is present, revealing their presence to these birds.
Split into simpler sentences: Some large ground-feeding birds, such as Currawongs, Magpies and Ravens will dig out newly established colonies after the queen has found a suitable spot to nest. Since small domes of excavated soil is present, this will reveal their presence to these birds.