- Developed in 1940 by George Ellis in the state of Delaware, these hardy birds make great dual-purpose breeds to add to any flock. They have white plumage with some black barring on the feather ends of their hackles. This breed matures quickly and the hens make great egg layers. The Delaware breed does well in free- range environments and this should be kept in mind when selecting these birds for your backyard or farm. This breed also tends to be calm and docile. APPROX. 260 LARGE EGGS/YEAR | EGG COLOR: BROWN | MATURE WT: MALE 8.5 LBS. FEMALE 6.5 LBS.