No. True Araucanas lay blue/green eggs. Mixed breed Americana and easter egger chickens can lay eggs of almost any color. Brown eggs from a "Araucana" suggests mixed breed.
Good healthy well cared for Araucana hens will lay 200 + eggs per year. Araucana's slow egg laying somewhat during the yearly molt but will often continue offering an egg every second day for the six...
Chickens, whether the chicken is brown, white, blue, red or, or... all start laying eggs when they are mature enough to do so. The average age for chickens to start laying eggs is 5-6 months of age....