Canal de Castilla Rey (Palencia), considered the beginning of the Northern Branch, Valladolid and Medina de Rioseco, lying at the end of the Southern Branch and Campos Branch respectively. The countryside crossed by the canal is of interest for its birdlife. In the Tierra de Campos there are two large Special Protection Areas ("La Nava-Campos Norte" and "La Nava-Campos Sur") which are notable for the birds such as great bustards ("Otis tarda") which live in the dryland farming areas (sometimes described as "steppes") which are typical of the region. The canal, on the other hand, provides habitats for wetland birds such as the
Porphyria cutanea tarda implicated in the origin of vampire myths. This is because people with the disease tend to avoid the sun due to photosensitivity (and therefore have a young complexion and pallor) and require blood. Hypertrichosis (i.e. A full head of hair) will also give a young appearance. Porphyria Cutanea Tarda is the name of a song by the rock band AFI on their fourth album "Black Sails in the Sunset", released on May 18, 1999. Porphyria cutanea tarda Porphyria cutanea tarda (PCT) is the most common subtype of porphyria. The disease is named because it is a porphyria that often presents