Complex sentence: Great bustards eat blister beetles of the genus "Meloe" to decrease parasite load in the digestive system; cantharidin, the toxic compound in blister beetles, can kill a great bustard if too many beetles are ingested.
Split into simpler sentences: Great bustards eat blister beetles of the genus "Meloe" to decrease the parasite load in the digestive system. Cantharidin, the toxic compound inside of blister beetles, can kill a great bustard if many beetles are ingested.