The ability to access profitable windows of opportunity has prompted some Manitoba farmers to diversify their production and broaden the traditional gamut of farm animals and crops. For example, some producers raise ostriches, lamas, emus, wild boar, and bison, and grow mustard seed, lentils, canary seed, and dried peas. Biological farms and tourist farms are also components of this diversification. Alternative farms aim at reducing the burden on natural resources and, as such, adhere to strict environmental requirements.