The Consequences of Imprinting

Jackdaws are probably the most common corvid species rescued and cared for in captivity, which is mainly due to the fact that they have adapted very well to an urban lifestyle and that they are often nesting in very close proximity to us humans. Jackdaw babies are also often perceived as being irresistibly cute in the eyes of many humans, which seems to persuade even completely unexperienced people to raise a jackdaw nestling or fledgling by themselves. Therefore it is not surprising that jackdaws are the most frequently imprinted corvid species. Before going into more detail about what imprinting means and what the consequences of imprinting are, it might be useful to look into some aspects of the natural behaviour and some of the normal social interactions of jackdaws.

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Rook Velvet – An Obituary

“Smooth like velvet” sprang into my mind when thinking of a name for our latest patient – a rook baby. It was May 2014. The lady who had kindly picked up Velvet underneath a rookery, situated in a massive cedar tree, cared for him at her home until she got overwhelmed by the task. When we were asked to take over, we noticed a nasty compound fracture of his left leg – the bone had pierced through the tender skin. It was a surprise Velvet had survived such a deep fall anyway, landing next to one of the busiest roads on the island. But the fractured leg needed to be treated, although we knew it would be too late to even hope for full function of the limb.

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Rook Laniakea – An Obituary

Laniakea came to us as an adult rook in Spring 2017. We did not know for sure how old she was when she arrived. However, it was very obvious to us that Laniakea was already an experienced and mature rook. When we rescued her, it became immediatly apparent that she would never be releasable. This thought was deeply troubling, in particular as it was very likely that Laniakea had a partner, who was waiting for her. Her arrival came with a big shock too, as she had suffered horrendous injuries to her leg, most likely caused by a spring trap. Laniakea had to undergo surgery, but recovered very well from her leg amputation.

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First Aid for Birds – How to help a Grounded Corvid Fledgling

Introduction

It is nesting season and corvid fledglings are about to leave their nests to start the big adventure of life. Corvid fledglings are fully feathered and healthy looking birds, who can perch, stand and hop by themselves. They are already able to fly short distances. Fledglings of many bird species leave the nest at this stage, and for good reasons. If they would remain in the nest, predators could have an easy meal, killing the whole brood at once. Leaving the nest and hiding scattered in trees, in the undergrowth or in bushes, even when not fully developed and not being able to fly properly, is the best way to increase survival chances. It gives fledglings the time and required exercise to improve their flying skills, which often takes less than a week of daily practice, after they have left the nest.

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