I try to make this clear in the title. We are in what should be the best time of spring migration. All the provinces of Burgos environment are to stop birds and in some parts of this province seem to shun us.
In my humble opinion, at this time Atapuerca gaps should hold a good contingent of migrating birds, but I think there are several reasons why this is not enforced. The project in its initial phase has been good, but the decline starts to bite at the site. Not to mention the broken doors of the observatories or most of the heather fence fall. I'm not saying anything about the people who wanders inside the enclosure or the state of access. I'll stick to the biological issue. I think there are two reasons why this place is home to barely a dozen water-related bugs. Rather, all could be summed up in one, the lack of food.
At this time of year when the birds are making a great flight time required for resting, shelter and food, places that can offer these things, other than peace and that, in Atapuerca, not fulfilled. Indoor aquatic areas are exploited mainly by two groups of birds (I mean the only linked to the aquatic environment), which feed on the banks (mainly waders) and those who do what is in it either plant or animal (ducks, herons, gulls and Stern). Right now in these gaps do not have any of those things. The banks are silted water due to heavy and constant rain we've had since late November, making an excess of water. Being home lagoons, partly artificial, does not have a natural drain, purge excess water. This should not be a problem since these water bodies have dams with gates that would let the water until we obtained the desired level in each season. The ideal level, at this point would be to allow banks to have a supply of mud for waders. This, I suppose, would allow the deposition of several species of this family of birds.
regard to food in the water also have a deficit. There being no fish, never will be a gathering place for herons, egrets, cormorants and storks, except perhaps juveniles in step postnuptial that will comply with the new year amphibians, frogs and toads. But terns, whiskered, seagulls, etc, besides those mentioned above, there is nothing to pick. Perhaps one can use it as a place for a short stop and nothing else, never settle. As for the ducks, I think the main problem is the lack of marsh vegetation on the banks and the ceaseless hassles (this afternoon when I've been there, beside the football field background, an army contingent encamped in maneuvers within 50 meters of the north shore of the lagoons)
This past week we had winds from the northeast, the best in this time of year to form plugs of migrants in places like this. Well, after I decide to go with the illusion of the clouds to meet a nice good morning, this was what I got:
- Redshank clear: 2 EJS. Adults in breeding plumage. One of them in this photo away.
- ringed plover: 3 EJS. Adults in breeding plumage.
- Little Ringed Plover: 1 single family.
- often Sandpiper: 1 ej. even in winter plumage.
- Dunlin: 1 ej. adult in breeding plumage, the testimonial photo.
Also in the water, a couple of dozen azulones, almost all males, because females are incubating. Yellow Wagtail good passage of Swallows as aircraft and Common Sand Martin and Barn Swallow. The photo shows a specimen of this species, possibly a male for the length of its two outer tail rectrices. 
Also, a common warbler in the reeds of the stream. As you see, little "Jera" for dates. Meanwhile, in provinces bordering ours and possessing wetlands of importance, but complying with seasonal ponds, but, yes, of natural origin (some managed by levees as well) are swelling of seeing waders (not both in quantity and variety) Many species of ducks, black storks, gulls, herons, egrets, purple herons, reed birds ... etc. This last week have taken such a step, that if they were two different people, one in the morning and afternoon at the same pond, saw things differently. Now that's fun.
For the rest, water azulones part of the following: 
And in the distance, also flew the Montagu's harrier is my first year, a male. East. 
addition, a pair of Water Pipit, passage. This would go through a tree pipit. 
To complete the pipits, there was a group of about twenty common pipits. I chopped and I walked through good habitat for the country, to see them all, but I had no luck. I have also seen an agate material common to build the nest. 
