Daniel Roca

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Frequently, when it comes to deciding which natural areas get protection and which ones don’t, one sad reality surfaces: most of the lucky ones are the ones with no potential for urban, industrial or agricultural development. In other words, it is relatively easy to protect (at least on paper) a mountain range. Not so much a coastal area near a great city.
Frequently, when it comes to deciding which natural areas get protection and which ones don’t, one sad reality surfaces: most of the lucky ones are the ones with no potential for urban, industrial or agricultural development. In other words, it is relatively easy to protect (at least on paper) a mountain range. Not so much a coastal area near a great city.
28 Mar 2021

Tordera river mouth: lights and shadows

Frequently, when it comes to deciding which natural areas get protection and which ones don’t, one sad reality surfaces: most…

Having had the opportunity to (humbly) collaborate in the making of this extraordinary book, for what I am happy and grateful, I thought it would be nice to give it a quick review. Now, All the Birds of the World is already a commercial success (and will be for a long time, I’m sure), and thousands of people have it in their homes at this point...
Having had the opportunity to (humbly) collaborate in the making of this extraordinary book, for what I am happy and grateful, I thought it would be nice to give it a quick review. Now, All the Birds of the World is already a commercial success (and will be for a long time, I’m sure), and thousands of people have it in their homes at this point...
20 Mar 2021

All the Birds of the World: A quick review

Having had the opportunity to (humbly) collaborate in the making of this extraordinary book, for what I am happy and…

Birds appearing unexpectedly far away from their regular range have delighted birders and puzzled ornithologists for a long time. The former may want to add a new species to their personal list or enjoy the exceptional sighting. The latter willing to trying to understand this complex phenomenon...
Birds appearing unexpectedly far away from their regular range have delighted birders and puzzled ornithologists for a long time. The former may want to add a new species to their personal list or enjoy the exceptional sighting. The latter willing to trying to understand this complex phenomenon...
16 Dec 2019

Mapping rare birds: Where do they turn up?

Birds appearing unexpectedly far away from their regular range have delighted birders and puzzled ornithologists for a long time. The…

Els ocells que apareixen lluny de la seva àrea de distribució, anomenats habitualment “rareses”, han despertat sempre un gran interès entre els ornitòlegs. Uns estudien aquest fenomen tan complex, per al qual de vegades es troba una explicació, però no sempre. Altres cerquen rareses per afegir-les a la seva llista personal d’espècies, o simplement per gaudir d’una observació excepcional.
Els ocells que apareixen lluny de la seva àrea de distribució, anomenats habitualment “rareses”, han despertat sempre un gran interès entre els ornitòlegs. Uns estudien aquest fenomen tan complex, per al qual de vegades es troba una explicació, però no sempre. Altres cerquen rareses per afegir-les a la seva llista personal d’espècies, o simplement per gaudir d’una observació excepcional.
16 Dec 2019

Cartografia de les rareses: a on apareixen?

Els ocells que apareixen lluny de la seva àrea de distribució, anomenats habitualment “rareses”, han despertat sempre un gran interès…

English summary: Water pipit distribution in Catalonia throughout the year. This animation was generated using thousands of records added by observers to www.ornitho.cat, a citizen science portal run by the Catalan Ornithological Institute (ornitologia.org). Bottom-right shows each 15-day period, the blue line represents the 1800 meters above sea level in the Pyrenees.
English summary: Water pipit distribution in Catalonia throughout the year. This animation was generated using thousands of records added by observers to www.ornitho.cat, a citizen science portal run by the Catalan Ornithological Institute (ornitologia.org). Bottom-right shows each 15-day period, the blue line represents the 1800 meters above sea level in the Pyrenees.
03 Dec 2019

Visualització de dades: Grasset de muntanya (Anthus spinoletta)

English summary: Water pipit distribution in Catalonia throughout the year. This animation was generated using thousands of records added by…

While collaborating with the Forest Sciences Centre of Catalonia Consortium, which studies and monitors endangered steppe-land birds and their habitat, I had the chance to film and edit this short video that explains how Pin-tailed Sandgrouse are captured, handled and GPS-tagged at night...
While collaborating with the Forest Sciences Centre of Catalonia Consortium, which studies and monitors endangered steppe-land birds and their habitat, I had the chance to film and edit this short video that explains how Pin-tailed Sandgrouse are captured, handled and GPS-tagged at night...
30 Sep 2019

Video: Pin-tailed Sandgrouse tagging with GPS transmitter

While collaborating with the Forest Sciences Centre of Catalonia Consortium, which studies and monitors endangered steppe-land birds and their habitat,…

Some friends went on a trip to the Canary Islands a few days ago. They are from Hong Kong and keen birders. On February 8th, during a short walk around “Parque de la Luz”, in Las Palmas de Gran Canaria, they were surprised by something unexpected: Red-winged blackbird (Agelaius phoeniceus). Not one, but two and possibly three individuals.
Some friends went on a trip to the Canary Islands a few days ago. They are from Hong Kong and keen birders. On February 8th, during a short walk around “Parque de la Luz”, in Las Palmas de Gran Canaria, they were surprised by something unexpected: Red-winged blackbird (Agelaius phoeniceus). Not one, but two and possibly three individuals.
19 Feb 2019

RW Blackbird in the Canary Islands

Some friends went on a trip to the Canary Islands a few days ago. They are from Hong Kong and…