Will O'Connor

@entosphenus.bsky.social

Ecologist and wildlife photographer.

A major fish kill has been recorded in the Cavan River at Cavan town. This video was recorded during an aquatic survey that I completed on the Cavan River in June 2024. Water quality and habitat conditions were already very poor at that time. Read the full post here:- x.com/EcofactEcolo...

More ongoing impacts on Freshwater Pearl Mussels (Margaritifera margaritifera) in the River Owenriff, Co. Galway, last week. An SAC containing one of Ireland’s most threatened freshwater species should not be managed like the edge of an ornamental lawn. Read here:- x.com/EcofactEcolo...

Ongoing impacts on Freshwater Pearl Mussels (Margaritifera margaritifera) in the River Owenriff, Co. Galway, last week. Galway County Council issued a derelict site notice for a property beside the river in June 2026, requiring the removal of overgrown vegetation. Read here x.com/EcofactEcolo...

Bonelli's Eagle (Aquila fasciata) in Parque Natural de Arribas del Duero, Zamora, Castile and León, Spain, June 2026. This species is listed in Annex I of the Birds Directive and is considered endangered at the European level. Spain holds around 80% of the European population.

Bild

Immature Spanish Imperial Eagle (Aquila adalberti) in Sierra Oeste de Madrid, Spain, June 2026. This species is one of Europe's rarest birds of prey and is listed in Annex I of the EU Birds Directive.

Bild

Female Golden Eagle (Aquila chrysaetos) in Parque Natural de Arribes del Duero, Castile and León, Spain, June 2026. The eagle has spread her wings and hunched over her prey in response to the nearby male. This behaviour is known as “mantling”.

Bild

Bonelli's Eagle (Aquila fasciata) in Parque Natural de Arribes del Duero, Castile and León, Spain, June 2026. This species is listed in Annex I of the Birds Directive and is considered Endangered at the European level. Spain supports around 80% of the European population.

Bild

Griffon Vultures (Gyps fulvus) in Zamora, Castile and León, Spain, June 2026. Like all vulture species, it was heavily persecuted in the past. However, thanks to conservation efforts, its numbers have recovered, and it is now the most common vulture species in Europe.

Bonelli's Eagle (Aquila fasciata) pair as viewed from a hide beside the River Douro, Zamora, Castile and León, Spain, June 2026. If you look very closely in the background you will also see a Golden Oriole (Oriolus oriolus) flying past.

Bild

Golden Eagle (Aquila chrysaetos) in the Arribes del Duero Special Protection Area (SPA), Zamora, Castile and León, Spain, June 2026. This SPA encompasses the left bank of the River Duero as it flows through the provinces of Zamora and Salamanca, forming the border between Spain and Portugal.

Bild

Iberian lynx (Lynx pardinus) in the Sierra de Andújar, Andalusia, Spain. The Iberian lynx has become a flagship species for European nature conservation, showing what can be achieved through sustained biodiversity protection, habitat restoration and species recovery work.

Bild

Sea Lampreys (Petromyzon marinus) spawning at a site within the Lower River Shannon Special Area of Conservation (SAC). Watch how they move stones and other riverbed material as they construct large spawning nests, known as redds.