It is usually not difficult to differentiate between adult rooks (Corvus frugilegus) and carrion crows (Corvus corone). Both species may look similar at the first glance, because both have black feathers that can also look glossy. However, the long pale and pointy beak, with bare skin around its base, is the most striking and characteristic feature of rooks. It is also worth knowing that rooks nest collectively in tall trees, often close to farms or villages, which are known as rookeries. In contrast, carrion crows are fairly solitary and are usually found alone or in pairs, although they may form occasional non-breeding flocks. Unlike rooks, carrion crows do nest solitary, maintaining a large breeding territory centred around the nest.
Additional help and information about how to identify adult corvids including rooks and carrion crows can be found on the British Trust for Ornithology website (BTO).
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It has been said that the eyes are windows to the soul. Research has shown that the apertures of our eyes offer a glimpse into the mind. No doubt that this applies to human and non-human animals. The pupil response to cognitive and emotional events occurs on an even smaller scale than the light reflex, but with the right tools this response is measurable.
When we give a human or non-human being moral consideration, then this simply means that we take into account how they will be affected by our actions, omissions, attitudes and decisions. Sentient individuals, regardless of their species, have morally relevant interests in being alive and in not being harmed, and this does not vary according to the fact whether a species is rare or common.
Spring is approaching, and this means that this year’s nesting season is about to start too. At this time of the year birds start building their nests, flitting to and from their nesting sites in search of nesting materials. Nesting behaviour and success are affected by weather and climate. And so it is no surprise that climate change is also having an impact on our native birds, leading to an even earlier start of the breeding season, which is causing the ecosystem to become unbalanced. Due to these changes, hatchlings and nestlings are potentially at risk of starvation, if their food sources, like for example insects or sand eel, are not emerging at the right time or near the place of nesting.
This short videoclip shows a fascinating encounter between a rather naughty and very persistent hooded crow and a juvenile mute swan. Neither the victim nor a nearby adult bird, presumably a parent of the young swan, seem to be too much annoyed by the antics of the crow, who repeatedly pulls the tail or tries to get hold of some wing feathers.