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.
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.
Two common questions we are being asked every year are how and when to release carrion crows, rooks and jackdaws. The answers to these questions consists of two main parts. The first part is based on generally accepted non species specific rehabilitation guidelines, and the second part is referring to species specific considerations.
One of topics commonly discussed in corvid fora and question frequently asked is what to feed crows, usually referring to birds in the wild, but also to birds cared for in captivity or during rehabilitation. One of the most frequent answers given is that the name carrion crow is a giveaway, and that crows would eat, who would have guessed, almost exclusively any type of carrion.
However, when looking through findings of scientific studies about feeding habits of corvids, confirmed and enriched by individual experiences of corvid rescues and rehabbers, it becomes evident that this answer is not exactly true and would in fact suggest an unhealthy and unbalanced diet.