Yellow hornets may look much like yellow jacket wasps however they are very different. Yellow hornets are normally a darker colour as well as being much larger than a yellow jacket wasp. Yellow hornets also have a deeper sounding buzz when they fly. As for aggression, yellow jacket wasps are normally more aggressive when compared to hornets. Hornets are rather laid back and will normally only attack if they feel threatened. Their foods are also different as during the autumn, yellow jacket wasps are attracted to human foods and waste resulting in aggressive contact between the wasps and people. Yellow hornets on the other hand will stick to feeding on other insects resulting in little aggressive contact between them and people.