Wildlife Archives - Page 2 of 7

01/06/202302/06/2023

Identification of Juvenile Rooks and Carrion Crows

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).

British Trust for Ornithology (BTO) – Identifying Corvids – Crow, Chough, Jackdaw, Rook and Raven

12/03/202312/03/2023

First Aid for Birds

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.

27/02/202312/01/2024

Naughty Hooded Crow

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.

20/11/202223/01/2023

Expert tips on helping birds during the winter by ‘Happy Beaks’ – Guest Blog

We would like to thank the team from Happy Beaks for including Corvid Isle in this very useful and informative blog post providing much needed information about how to support our garden birds during winter. We hope that you enjoy this blog post and find the information provided useful.

Expert tips on helping birds during the winter

More information can be found by following the links below:

Winter Bird Feeding Tips

Feeding Wild Birds In The Winter

31/08/202231/08/2022

Rook Isla

Isla joined us recently at nestling age after being rescued by well-meaning but inexperienced people. We do not know a lot about Isla’s story other than that she has been found as a presumed orphan. We understand that the carer struggled increasingly to raise Isla. After about two weeks they gave up and brought Isla eventually to a local bird rescue, who recognised immediately that Isla was in great trouble. Subsequently, we have been asked to take over Isla’s longterm care and rehabilitation, which we did.

Juvenile Rook Isla — Rook Isla after her first bath

Coexistence of Multiple Health Conditions

After a thorough assessment we found that Isla showed signs of a septicaemia with undulating temperatures. She also demonstrated extensive soft tissue swellings involving hock, ankle and foot joints. Interestingly, Isla’s wing joints were completely preserved. Both very swollen hock joints showed already several small pressure sores. Additionally, obscured by the marked joint swelling, we also noticed an unusual deformity of Isla’s right-sided hock joint and foot, which rather looked like a traumatic injury than a congenital deformity or simple involvement by the coexisting inflammatory joint disease. It was difficult to ascertain the exact pathology due to the severity of joint and soft tissue swelling. However, careful physical examination showed a lack of sensation and power in the injured foot, which made it likely that a trauma has caused at least part of the hock joint swelling, having also lead to a nerve injury. Also, it seemed very likely that Isla has suffered a spinal contusion, as she showed a slight weakness in both legs, whilst both hip joints remained unaffected by joint infection and lack of power. Not unexpected in Isla’s case, as her immune system was clearly overwhelmed, we found her suffering of an external and internal parasite infestation.