- The Tetra Brown is the bird of choice for today’s egg farmers. It is a hybrid type of Sex Link originally the result of crossing Rhode Island Reds and Rhode Island Whites, but now contains genetics from a wide range of breeds. They are a very docile bird and will get along in almost any environment. APPROX. 260 LARGE EGGS/YEAR | EGG COLOR: BROWN | MATURE WT: MALE 6 LBS. FEMALE 5 LBS.