Despite being a privileged space for bird watching, Monteagudo reservoir has seen better days. Two of the main species of the reservoir, They are now almost testimonial. In the summer months it was established here the best colony of Black-necked grebe (57 nests 2002) and concentration over 1000 individuals Red-crested pochard, from other places to make your moult.
Also in winter a number of wintering birds were concentrated: 1.000 birds on average in the years 80,700 in the 90s-early XXI century, but just 100 nowadays. All these changes, negative, in the population of these water birds that depend on the underwater flora should, as we have indicated, the presence of carp and other fish that have altered to make it disappear, the vegetation and, thus, the ability of these birds to find food.
But this is no obstacle that we can not continue to enjoy many species of birds such as:
Cranes (Mid February / March and late October / first half of November). Surely it is the greatest show with which you can enjoy today in the reservoir. Monteagudo situation on the migratory route of this and many other birds, makes the presence of cranes use the reservoir as a rest and relaxation on their trips is a constant. If we're lucky we can come up with figures of several thousand cranes make a stop here. If you have slept, they will use the most northwestern shore, precisely the only bank in which there is no way around.
A close walk there only going to get us to raise and disturb all, so that it is more than inadvisable. The best place to see them is from the viewpoint. from here we can witness, if we are one day early in the morning, how they are slowly stretching cranes and depart, or to continue their migratory route or to eat something on cereal farms nearby, especially in the plain that leads to Fuentelmonge.
Lesser kestrel (mid July-late August). This is a species that does not play, neither here nor anywhere else in the province of Soria. Nevertheless, on the dates indicated, about 50 Kestrels use power lines near the entrance to the reservoir as an innkeeper.
Such concentrations occur in other areas of the province and correspond to the summer movements of this species leaving their breeding grounds in the southern plateau and the valley of the Ebro because the heat has killed its prey and moves to other areas of the cooler north.
Osprey versus Black stork (March-May, mid August-early October). Both species have increased, fortunately, their populations in Europe and its observation in the waters of the interior is not as rare as today as it could be done 25-30 years. A sample of, as we have indicated in the case of cranes, the strategic location of the reservoir for many migratory birds.
With a little luck in the case of the osprey we can see some fishing haul. If successful you will go with the fish fish to a nearby electric pole where he will give a good account of it. The review of all support poles and power lines surrounding the reservoir has to be something you do because there could always see especially raptors, especially in spring-summer Black kites, Short-toed eagle, Common buzzard, Booted eagle, Eurasian hobby and Golden eagles as tenants thereof. We can also observe the Carrion crows, present throughout the year in the reservoir and surrounding.
Somormujo lavanco. (From mid-February to November). the rarefied Eurasian coot to near disappearance Great crested grebe is, with him Mallard, the most representative aquatic bird reservoir. In late summer the Great cormorant population is approaching 50 specimen and it is a sight to see these birds in mating season. In winter you can get a copy, but usually disappears entire population.
Garganey (March to mid-April). Mallards can be seen all year round and, in steps, can be seen in low numbers all anatidae surface of the country. These include the garganey it is still observed in good numbers in the prenuptial migration. To highlight the 205 specimen seen the 12 March 2009.
Passerine species. Even though sometimes visited a wetland thinking only passerine species not own no less true of these spaces is that it would be foolish to long for the many more species of passerines we can see over here. Still in winter, this is evident with large flocks of linnets and Rock sparrow. There's also Crested lark, Thekla lark, difficult to distinguish because here sometimes appear in the same places. White wagtails, Meadow pipit and Water pipit they move on the banks.
As spring progresses, for March, They begin to appear the first swallows and martins. In April we may be witnessing the passing of many of these birds, although you can not compare in this regard a few days of September, with thousands of House martin, Sand martin and Barn swallow. Along the April they are coming Greater short-toed lark, Tawny pipit and Spectacled warbler, three species of steppe habitats frequently here. And tied to the water Yellow wagtail. Hopefully early May also we enjoy the spectacle of the Common swifts and Fieldfare for insects to be peak. At that time almost all the summer visitors are here. On the rocks that make up the closure of the reservoir at various points we see Northern wheatear.
It will be after reproduction, from the end of July, everything August to mid September when the maximum flow is generated in migratory passerines. Elusive and rare species such as Grasshop per warbler and Savi’s warbler and the Bluethroat they cited every year here.
Black-bellied sandgrouse / Curlew / Little bustard. The cereal countryside surrounding the reservoir to Fuentelmonge, but, especially, to Almaluez, they have been the habitat of steppe birds like Black-bellied sandgrouse, the Stone-curlew and the Little bustard. Precisely the population of Black-bellied sandgrouse was the main reason for the statement as SPAs of this space with 25-30 couples estimated at the beginning of this century.
Today, nevertheless, the population has been evacuated much and we can not see the image of Black-bellied sandgrouse flying over the reservoir and stopping to drink water. Nor bitterns and raised on the slopes and fields adjacent to the water surface.
To see these species -and perhaps the Little bustard also- the best is to travel the road between Monteagudo with Almaluez in spring and make a stop in one of the ways we meet. With a little luck we can see, in addition to the ubiquitous and very beautiful Calandra larks in their nuptial flights, the fleeting passage of a pair of grouse or get out a male of Little bustard.