This episode\u2014which is Number 92\u2014is all about the value of desert ecosystems as habitats for birds.Deserts are important for the birds that are adapted to live in them\u2014birds that can handle the harsh conditions. Deserts are home to relatively few bird species. Only the polar regions and maybe some parts of the open ocean have less bird diversity.Even if a bird species can handle the extremes of heat and cold in a desert, the desiccating winds, and the lack of water, that bird may not find much...