An essential stopover
Laguna de Gallocanta is an important layover for the common crane (Grus grus) on its vast migration. These birds travel from their breeding grounds in northern Europe—including Scandinavia, Germany, and the Baltic states—to wintering areas in southern Spain and North Africa. The lake's location on the Iberian Peninsula makes it a perfectly positioned rest and refueling station. Tens of thousands of cranes use the site, with peak counts sometimes exceeding 100,000 individuals in a single day. The main southbound passage occurs from mid-October through November, with the return journey north happening between mid-February and March.
The cranes are drawn to Gallocanta for two primary reasons: safety and food. The large, shallow saline waterbody provides a secure overnight roost, protecting the birds from terrestrial predators while they rest. At sunrise, the cranes leave the lagoon in massive, trumpeting flocks to feed. They spend the day in the surrounding agricultural area, foraging on leftover grains from the cereal harvest. This combination of a safe "bedroom" and a well-stocked "kitchen" makes the lagoon an important hub on the western European flyway.
A landscape of salt and feathers
Laguna de Gallocanta is one of the largest natural saline lakes in Western Europe, covering an area of over 14 square kilometers when full. Situated on a high plateau over 1,000 meters above sea level, it is an endorheic basin, meaning it has no outlet to the sea. Its water level and salinity fluctuate dramatically depending on rainfall, and it can occasionally dry up completely. This high-salinity environment supports a unique ecosystem of invertebrates and specialized salt-tolerant plants called halophytes.
The common cranes that visit are large birds, standing over a meter tall with a wingspan that can reach 2.4 meters. Their daily routine at the lagoon is highly structured. After feeding in the fields, they return to the lagoon at sunset in orderly, silhouetted formations. During their stay, the cranes also engage in complex social behaviors, including their famous "dance." This display involves leaping, bowing, and throwing sticks, which helps to form and reinforce pair bonds. Their loud, bugling calls are a dominant feature of the area, audible from several kilometers away.