INAGA and Bird-Nesting Periods in Monegros

Executive summary

The public environmental layers show that the general area is ecologically sensitive: it is close to Red Natura 2000 sites and mapped protected-species areas. Published INAGA decisions elsewhere in Aragón commonly restrict noisy work during bird breeding periods, sometimes until 15 August.

Taken alone, those facts might suggest that every week from May through July should be treated as high-risk until INAGA confirms compatibility.

However, the most probative fact is the site’s actual permitting history: a festival of comparable size and disturbance has operated in the Sierra de Jubierre in early July for many years and has previously received authorisation. That makes an outright nesting-related refusal for the same or nearby early-July dates substantially less likely than an environmental-layer analysis alone might suggest.

That practical precedent is strongest for the established site. The new proposed site must be assessed separately: the confirmed point lies inside the mapped lesser-kestrel protection-plan scope and approximately 849 m from a mapped lesser-kestrel critical area. A prior authorisation at the established site therefore cannot simply be carried across to the new location.

The single most valuable document is the previous authorisation and its underlying environmental reports. It will show whether INAGA participated, which dates it assessed, and whether bird-related conditions were imposed.

1. Information supplied

Proposed activity

The disturbance is not ordinary construction or agricultural work. It includes:

• approximately 2,000–3,000 attendees;
• amplified sound systems operating throughout the night;
• artificial lighting;
• camping and continuous occupation;
• extensive pedestrian movement;
• private, service and emergency vehicles;
• generators and other temporary infrastructure;
• setup and dismantling outside the advertised event dates;
• possible works or crossings associated with bordering barrancos.

INAGA would be expected to assess the complete operational envelope, not merely the dates when tickets are valid.

Confirmed locations

Two precise site coordinates have been supplied:

• Established site: 41.7005615, -0.1363139
• New proposed site: 41.6916330, 0.0099090

For the established site, a Spanish Catastro coordinate lookup returned:

• Polígono 19, Parcela 78
• M.U.P. H0331 “Jubierre”
• Castejón de Monegros, Huesca

The established site is confirmed to be within a Monte de Utilidad Pública. A separate Aragón authorisation is therefore required for special communal use and the holding of an event in a publicly managed forest. The corresponding cadastral and public-forest status of the new proposed site should be confirmed independently.

Site footprints still required

There is no remaining uncertainty about the two supplied reference coordinates. However, a precise centre point is not the same as the complete footprint of a festival of this scale. The final assessment for each site needs a polygon covering every stage, sound-system orientation, camping, parking, generators, lighting, roads, sanitation, setup areas and any barranco crossing.

2. Environmental constraints shown by public data

Official spatial overlay at the established site

Current Aragón threatened-species layers and national Red Natura 2000 data were downloaded and spatially compared with the confirmed established-site coordinate, 41.7005615, -0.1363139.

The established-site point itself did not fall inside a formally designated species critical area or protection-plan scope in the downloaded data. Nevertheless, proximity to a ZEC and ZEPA is relevant where noise, light and traffic can extend beyond the event boundary.

New proposed site

The same official layers were compared with the confirmed new-site coordinate, 41.6916330, 0.0099090.

The point is not inside a mapped lesser-kestrel critical area, but it is inside the species’ wider protection-plan scope and is considerably closer to a critical area than the established site. This does not by itself mean that a May–July festival will be refused, but it makes current bird records, field evidence and INAGA’s site-specific view materially more important. The new site also requires a separate cadastral and land-status check.

Birds recorded for the nearby ZEPA

The official Natura 2000 Standard Data Form for Sierra de Alcubierre lists breeding, resident or regularly occurring birds including:

• golden eagle and eagle owl;
• short-toed eagle, black kite and red kite;
• Egyptian vulture and peregrine;
• stone-curlew;
• calandra lark and greater short-toed lark;
• black-bellied sandgrouse;
• turtle dove;
• several other steppe, scrubland and migratory birds.

This does not prove that any of these species nests within the festival footprint. It does explain why INAGA could reasonably ask for current field evidence.

3. Legal and regulatory framework

General wildlife protection

Spain’s Law 42/2007 prohibits conduct including intentionally disturbing protected wildlife and damaging or destroying nests, breeding sites, resting sites, eggs and young. This is not a fixed calendar prohibition: it applies according to the actual species and circumstances, including the presence of an active nest.

Red Natura 2000

Projects capable of appreciably affecting a Red Natura 2000 site must be assessed against that site’s conservation objectives. A project does not necessarily have to be physically inside the protected boundary if noise, light, traffic, pollution or other effects can reach it.

Aragón environmentally sensitive areas

Aragón’s environmental law provides for project-specific assessment in environmentally sensitive areas, including Red Natura 2000, threatened-species plan areas, designated critical areas and other protected environmental zones. The environmental authority may impose conditions, require further evaluation or determine that an activity is incompatible.

Protected-species plans

Relevant Aragón instruments include the Bonelli’s eagle recovery plan, the lesser-kestrel conservation plan and designated critical areas for threatened species. The Bonelli’s eagle plan recognises nesting, feeding, resting and breeding-pair territories as potentially important. The lesser-kestrel plan and subsequent INAGA decisions are particularly relevant to timing.

Public-forest event authorisation

Because the established site is within MUP H0331 Jubierre, an event there also needs authorisation for special communal use and holding an event in a forest managed by Aragón. That process can include environmental and fire-prevention measures, limits on vehicles and generators, waste and restoration duties, and consultation with environmental technicians or Agentes para la Protección de la Naturaleza. The new site’s land classification must be checked separately.

Municipal and other permissions

An INAGA or forest authorisation does not replace municipal activity and event licensing, noise compliance, emergency approval, health and sanitation requirements, camping permissions, traffic management or CHE authorisation for works affecting barrancos or the public hydraulic domain.

4. Breeding-period evidence and the May–July concern

INAGA does not use one universal nesting calendar for every project. Conditions are species-, site- and activity-specific.

Nevertheless, published Aragón decisions involving lesser kestrel repeatedly use windows such as:

• noisy activity permitted only between 15 August and 15 February;
• work permitted between 15 August and 1 April;
• restrictions between approximately 15 April and 15 August;
• prior inspection of potential colonies, followed by restrictions if occupation is confirmed.

These decisions principally concern construction, extraction or infrastructure and are not automatically binding on a festival. They demonstrate that INAGA sometimes treats all of May, June and July as part of the relevant breeding window.

Potential festival disturbance

• low-frequency sound travelling beyond the site;
• continuous night-time noise and disturbance at dusk and dawn;
• artificial light in otherwise dark habitat;
• people leaving defined public areas;
• traffic on rural tracks;
• setup and dismantling noise;
• displacement from feeding or resting areas;
• nocturnal disturbance to eagle owl and stone-curlew;
• ground disturbance affecting steppe birds.

Conservative ranking from calendar evidence alone

This evidence means July cannot be assumed safe merely because it falls later in the season. The site’s established July authorisations must then be weighed alongside that general biological evidence.

5. Effect of the prior authorisation

What remains unknown

1. An authorisation containing a favourable INAGA report would be the strongest precedent.
2. A public-forest authorisation incorporating biodiversity conditions would also be strong evidence.
3. A municipal event or activity licence only would prove local acceptance but might not prove that INAGA examined nesting birds.
4. An authorisation for a materially different footprint, capacity, schedule or sound arrangement would be relevant but less conclusive.

The prior file should therefore be reviewed before assigning high confidence.

6. Estimated likelihood of nesting-related refusal

The estimates below apply principally to the established site. They assume substantially the same site and event model, no serious previous compliance problem, no newly identified nest or breeding territory, and a process broadly comparable to previous years. They are reasoned ranges, not INAGA statistics.

The new proposed site can still be given a provisional planning estimate, but only with wider ranges and an explicit warning that current field evidence could move the assessment sharply. Its location inside the lesser-kestrel protection-plan scope and approximately 849 m from a critical area creates a materially different site-specific question for INAGA.

Provisional planning estimate for the new site before field evidence

These ranges are intended for comparative planning. They are not published INAGA statistics and should not be treated as a prediction of the final decision.

How field evidence could change the new-site estimate

For an early-July event, the more useful model is conditional:

The value of this scenario table is not numerical precision. It identifies the evidence most capable of changing the practical answer: occupied colonies, feeding and flight use, acoustic exposure, sound-system orientation and mitigation acceptable to INAGA.

Relative date ranking for bird nesting

1. early or mid-July;
2. late July;
3. late June;
4. early June;
5. May.

Overall permission risk may rank differently

Nesting is not the only issue. Late July can carry greater wildfire danger, heat risk, water demand, evacuation difficulty, machinery restrictions and pressure on emergency services. The environmentally easiest nesting date may not therefore be the easiest date for the complete authorisation.

7. How alternative dates compare with the established July precedent

Another early-July week

This is the strongest application because it closely matches actual precedent. Refusal becomes more likely if the venue moves, stages point towards protected habitat, capacity or sound increases, setup begins much earlier, new protected-species information arises, or previous conditions were not followed.

Late June

Late June may be close enough to the precedent to remain manageable, particularly if past early-July editions already involved setup, staff and vehicle activity then. The comparison must use the previous first build day, not only the public opening date.

May or early June

This is a more significant change because it advances sound testing, construction, camping, traffic, lighting and dismantling. A previous July approval does not necessarily establish that the same disturbance is acceptable during May incubation or early chick-rearing. May is therefore not obviously impossible, but it presents a genuine additional question for INAGA.

Late July

For birds, late July may be no worse and could be better for some species. However, lesser-kestrel restrictions elsewhere commonly continue until 15 August, fledged young can remain dependent, second broods may still be present, and wildfire and heat risks increase.

8. Recent festival comparison

On 21 July 2026, INAGA recorded a negative decision for the proposed Festival Sizigia Eclipse 2026 at La Sotonera reservoir in Huesca. The public INAREIA listing confirms the result; the full ecological reasoning was not available in the public material retrieved during this research.

This should not be treated as a direct precedent. La Sotonera is a different environment, associated with significant wetland and bird interests, and the project details may have differed substantially. It does show that INAGA will scrutinise large temporary festivals in environmentally sensitive rural locations rather than treating them as automatically permissible.

9. Documents and data that would most improve confidence

Previous authorisation

This is the highest-priority item. Search within it for:

• INAGA, informe favorable, avifauna and nidificación;
• periodo reproductor, Red Natura and condicionado ambiental;
• Agente para la Protección de la Naturaleza or APN;
• Monte de Utilidad Pública, Jubierre and expediente;
• montaje, desmontaje, ruido and iluminación.

The review should establish who authorised the event, the exact geographic footprint, the first setup and final dismantling dates, whether bird surveys or annual nest checks were required, whether July was identified as the permitted window, and whether there were post-event monitoring reports.

Official Aragón SIBA information request

The public SIBA viewer contains more than two million biodiversity citations, but sensitive nest locations may be generalised or withheld.

Request all available records of protected birds, breeding territories, nests, colonies, roosts, feeding areas and critical habitats within at least 5 km of the complete event footprint, with particular attention to records between February and August and to Falco naumanni, Aquila fasciata, Neophron percnopterus, Milvus milvus, Circus pygargus, Pterocles species, Burhinus oedicnemus and other steppe or nocturnal birds.

The request should also seek previous INAGA reports concerning festivals held at the site or within MUP H0331 Jubierre, ornithological surveys submitted by organisers, APN reports, previous conditions and post-event monitoring.

Supplementary data

The eBird Basic Dataset requires a free Cornell/eBird account and a data request. Ornitho Aragón registration may provide additional regional observations and local observer knowledge. Both are supplementary and should not replace SIBA or professional field surveys.

Field ornithology

Depending on INAGA’s response, useful work could include dawn breeding-bird surveys, dusk and nocturnal surveys, targeted lesser-kestrel colony checks, raptor-territory searches, steppe-bird transects, pre-event nest inspection and acoustic propagation assessment towards sensitive habitat.

10. Questions for INAGA

1. Does the complete footprint intersect or appreciably affect a species plan, critical area or Red Natura 2000 site?
2. What previous INAGA reports exist for festivals or other events on these parcels?
3. Are any weeks in May–July presumptively incompatible?
4. Does INAGA distinguish between public event dates and setup or dismantling?
5. Would approval require an ornithological survey for the relevant year?
6. Is an active-nest survey immediately before setup required?
7. What buffer distances would apply to a confirmed nest or colony?
8. Would amplified music throughout the night be accepted?
9. Are sound orientation or ecological-receptor limits required?
10. Are lighting restrictions or dark corridors required?
11. Would ecological supervision be required?
12. What stop-work or stop-event protocol applies if an active nest is discovered?
13. Does the prior early-July authorisation establish a usable precedent for nearby weeks?
14. Is May materially less compatible than late June or July?

11. Sources reviewed

Official legislation and procedures

• Spanish Law 42/2007 on Natural Heritage and Biodiversity
• Aragón Law 11/2014 on Environmental Prevention and Protection
• Authorisation for events in publicly managed forests
• Uses and activities in protected-species plan areas
• Aragón environmental-information request
• Decree 326/2011: Bonelli’s eagle recovery plan
• Decree 233/2010: lesser-kestrel conservation plan

Official mapping and biodiversity information

• Aragón Open Data: designated critical areas
• Aragón Open Data: protected-species plan scopes
• MITECO: Red Natura 2000 downloadable data
• Aragón SIBA species atlas
• Aragón SIBA biodiversity-record viewer

Festival and supplementary sources

• INAREIA public environmental-resolution database
• Diario del Alto Aragón: Nowhere’s history in Monegros
• Ornitho Aragón
• Cornell/eBird data access