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
Ben 10: Secret of the Omnitrix exclusively at Walmart stores. However, neither of the alternate versions were on the disc, merely the original with Heatblast, but the fourth season DVD contains all four versions, plus the pop up trivia version. The film comprises the three episodes of the fourth season, and is a finale to the series canonically. During a battle with Dr. Animo, Ben Tennyson's destruction of the scientist's "DNA bomb" accidentally sets off a self-destruct protocol in the Omnitrix. Its activation alerts Tetrax Shard, a bounty hunter and ally, who travels with his alien slime -like pilot Gluto to Earth in order to retrieve