Crows To Clean Up Cities – Ignorance Versus Intelligence

Carrion crow Merilyn

The list of animal exploitation is long and includes the abuse of animals for food, clothing, entertainment and experimentation as well as as companions and workers. Right now, there is a new scientific project making its rounds through the media, which is suggesting a new method to keep our cities clean. The idea has been developed by Dutch scientists und is focussing on the utilisation of specific traits of an animals species, which could theoretically help to tackle one of the biggest human evolutionary shortcomings – to be willing to live in harmony with nature and the environment. The project design incorporates a machine and is recruiting and training city crows, who would take care of recklessly discarded cigarette butts.

It is known that cigarettes take between ten and twelve years to decompose. The scale of this waste problem is huge, as it is estimated that every year approximately 4.5 trillion cigarettes are discarded with no regard for the environment. The project is using a so called ‘Crowbar’, which is based on a design created by an American inventor. The device has a large funnel, where cigarette butts can be deposited, and a dispenser for releasing peanuts as a reward. The hope is that crows get busy cleaning up the streets in exchange for some easy food. This idea is trying to utilise the generally acknowledged fact that crows are very intelligent and adaptable being known for their ability to solve complex problems and also to create and use tools.

Before looking at ethical questions related to this idea, there are at least two ‘technical’ problems to address, which the inventors might not have fully thought through. First off all, it is very likely that crows will always have a food choice in our crowded cities, meaning that peanuts may not be that much attractive as a food reward. Secondly, our crows are usually territorial, which means that only one territory holding pair is going to use that machine, which doesn’t seem very efficient, when it comes to cleaning up our large cities. These two problems alone are likely to be sufficient enough, to put this questionable idea to rest.

However, without a doubt, this project raises also several ethical issues, the most important ones being the egocentric and anthropocentric way of human thinking and attitude. Obviously, common sense tells us that the far simpler and cheaper way of solving the cigarette butt problem is to educate people, in this particular case smokers. Instead of constructing, deploying and maintaining machines, which are leaving a noticeable carbon foot print behind, one should rather educate and encourage smokers to quit smoking, or at least to discard their waste products appropriately, which is the least one could expect from a grown up human being.

Carrion crow Pan Tau

However, the problem is far more complex than that. Firstly, as mentioned already, the suggested solution is based on an anthropocentric view point. Humans have long tested animals to see how smart they are by seeing if they can do human-like tasks. We are too quick to judge animals by our own human standards, instead of testing within the limits of the animals’ natural behaviour and within their natural setting. By any standard used, we all know that corvids are clever enough to be able to fulfill this particular task, but so are other sentient beings, like toddlers too. And this leads to the second problem.

Humans do not treat sentient and intelligent beings like crows as equals, meaning we treat them differently, and by far not the way we would want to be treated, despite that there is a general agreement about the fact that humans and crows are both, sentient and intelligent. It is actually even worse, the anthropocentric view point is so deeply rooted, that many humans are often tend to focus on the level of animal intelligence (compared to humans) rather than sentience, when it comes to decide how to treat an animal, ignoring completely the fact that humans are not unique in possessing the neurological substrates that generate consciousness.

Ethical Methods Of Feral Pigeon Management

Corvid Isle FAQ

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The truth is that this machine, when it would actually work, would exploit crows, ignoring the fact that it is morally wrong to use or exploit sentient beings in any way. Even worse, this machine is putting these birds at an additional risk by encouraging and rewarding them to handle toxic and also possibly still burning cigarette butts, which might even end up in a place, where we might not want them to be. Furthermore, at least to a certain degree, these birds will be made dependent to rely on human handouts. Based on the natural behaviour of corvids, they will also cache their food, or potential valuables like cigarette butts, as they might want to trade them in later. The result will be that litter will not only be removed, but also be distributed in a different, not nessarily desired pattern. It is also to expect that crows will test the built in scanner to its limits, simply to find out, if other items like pebbles or pieces of paper also trigger food rewards, something which will put the whole machine to a test.

Carrion crow Arwen

Sadly, even some bird and corvid lovers seem to find this idea fascinating, as they feel that this approach spreads the word and is helping to change and improve the traditionally bad reputation of corvids. It might even do that, but by disregarding the rights of an individual sentient being and by supporting exploitation. Luckily, regardless of all ethical issues, and purely due to technical problems alone, it remains doubtful that this machine is ever going to work.

Ethical Methods Of Feral Pigeon Management

Feral pigeon family

Pigeons are one of the most intelligent and adaptable birds on our planet. Feral pigeons are derived from domestic pigeons that have returned to the wild. It is thought that the domestic pigeon was originally bred from the wild rock dove, which naturally inhabits sea cliffs and mountains. Although this is a commonly held view, it is probably far more likely that the rock pigeon domesticated itself in order to exploit the wasteful humane society. However, thousands of racing pigeons and doves are intentionally released each year, many of them joining feral pigeon flocks and breeding with their cousins. Feral pigeons find the ledges of buildings to be a suitable substitute for sea cliffs and have become well adapted to urban life. Pigeons usually breed when the food supply is abundant, which in cities can be any time of the year. Laying of eggs can take place up to six times per year. Surprisingly, despite the high reproduction rate, feral pigeons often only have small populations within cities. Feral pigeons usually reach their highest densities in the central parts of cities and because of that they are frequently encountered by people creating a scenario, which often leads to conflict.

Pigeons Peter and Jimmy

The Myth About Feral Pigeons Being Health Hazards

Feral pigeons are often considered a pest or vermin, owing to concerns that they spread disease including bird flu, despite scientific evidence that pigeons do not carry the deadly H5N1 strain. It is rather rare that a pigeon will transmit a disease to humans, but so do other animals including pets. Having said that, pigeons can pose a health hazard, in particular if birds die as a result of having been trapped and decomposing carcasses become maggot-infested, particularly during summer months. This often happens as the result of non-professionally installed or damaged netting, which is supposed to keep birds out, and not in. In that context, there are also legal implications in respect of netting and inadvertently trapping live birds, where property owners can be prosecuted for causing unnecessary suffering.

Feral Pigeons And The Pest Control Industry

The real enemies of pigeons, and the health of humans and other wildlife, are the profit orientated pest control industry, and to a certain extent the well meaning lay pigeon feeder, because without lethal controls and the deliberate persistent feeding of pigeon flocks, the pigeon would only exist in small numbers and nothing would be like the problem it is currently perceived to be. Lethal control methods are without exception inhumane, unethical and morally wrong as they inflict suffering to sentient beings, who are actually suffering already because of us. In fact, the pest control industry is largely responsible for the massive global rise in pigeon numbers due to excessive and commercially motivated use of lethal control methods. Killing adult pigeons in a feeding flock favours the younger birds, which would otherwise have a smaller chance of survival. The size of a pigeon flock is dictated by the amount of available food.  The physical removal of birds from a flock will increase the food supply for the remainder of the flock and will also create a void, into which surviving members of the flock breed.

Feral pigeon Julie

Inhumane Methods Of Feral Pigeon Management 

A common method being used by pest controllers is poisoning. When pigeons are fed poisoned bait, surviving birds do not leave the area. On the contrary, they are left with more food per bird than before. This also attracts pigeons from outside areas as well as encourages breeding, and populations are increasing. An additional problem with poisoning is that it also kills natural pigeon predators, like peregrine falcons. Other inhumane and money wasting lethal methods being used are shooting, cage trapping and the abuse of birds of prey. Most pest controllers use harris hawks as the favoured control option. This bird of prey is not a natural predator of our feral pigeon and is much slower in flight and therefore this bird poses no threat to a healthy and experienced pigeon. The use of a bird of prey is neither ‘green’ nor ‘natural’. Using one species of bird to kill another, particularly when the hawk concerned is not the natural predator of the target species, is clearly not ‘natural’. In fact, this kind of pest control  is nothing else than another bloodsport, where birds of prey are abused to kill other species of birds and animals for the pleasure of the human handler.

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Corvid Isle Sanctuary

Humane Methods Of Feral Pigeon Management

The first simple and effective step to humanely control pigeon populations is to reduce uncontrolled feeding, which is aimed to reduce the reproduction rate and not intended to starve birds to death. Cities around the world have discovered that not feeding their local birds results in a steady population decrease in only a few years. Pigeons, however, will still pick at garbage bags containing discarded food or at leftovers carelessly dropped .

The next step is to directly influence the reproduction cycle. The use of dovecotes and designated feeding areas in public places combined with the use of pigeon lofts located on buildings has helped to concentrate and control pigeon numbers in a humane but effective manner. Eggs are replaced with dummy eggs in artificial pigeon houses to reduce the number of offspring. This also allows to keep an eye on the health of the local pigeon population. Another promising method is the use of nicarbazin, which is a compound for avian contraception. Originally developed for use in resident Canada geese, nicarbazin has been introduced as a contraceptive for feral pigeons. This contraceptive is both, non-hormonal and fully reversible. Declared safe and humane, the new technology is environmentally benign and does not represent a toxicity hazard to raptors or scavengers.

Crested archangel pigeon Merlot

All in all, an ethical holistic approach is needed and already readily available to influence pigeon numbers humanely, which has a positive effect onto the health of our feral population and is also reducing cruelty and suffering of one of the most lovable bird species on our planet.

 

Why Not To Light A Bonfire

Sunrise Wootton Bridge

It is soon the time of the year again, where social media messages are piling up in your ‘virtual inbox’ advising you to check your garden woodpile for hedgehogs before you start a bonfire. And you certainly should, if you really cannot live without a bonfire to annoy your neighbours, cause an asthma attack and to pollute the environment.

Caterpillar

But do you really have to light a bonfire? Most certainly not. Let us start with some basic biology and ethics. It is a wrong and typical speciesist as well as anthropocentric view to focus only on one or a selected few, often popular species, in this case yourself and the hedgehog. If you have built your bonfire woodpile over a longer period time, then you actually have done something wonderful by creating a mini ecosystem with a very rich biodiversity of different species, who benefit from your hard work, and you as the garden owner will too. Frogs and newts need somewhere to spend the winter and a wood pile is just the place. Toads might shelter or even hibernate here as it is safe and damp. Centipedes, ground and rove beetles live happily here and will take care of slugs and their eggs. Fungi are great food for wildlife and will help to recycle rotting wood and make also good food for slugs and snails, which in turn attract hedgehogs and garden birds. You may even find slow worms and endangered stag beetles in your little wood pile world. So checking for one species, whilst ignoring and killing others unnecessarily, is simply short sighted, not justifiable and morally wrong.

Fern

The ideal case scenario would obviously be to just leave the woodpile alone. Alternatively, you could compost your garden waste by yourself before it builds up, or if the amounts are to big, then you could bring the waste to a tip, where it will be done for you. And if you have got the unfortunate type of organic waste, which is normally not regarded as compostable, then you can obviously let the council collect these scraps, or you can compost it directly, together with vegetable and fruit scraps, in your kitchen by using the Bokashi composting method. Bokashi composting is a cheap, easy and odourless method of composting that is so quick that all kitchen waste from a large family could be composted in something as small as a 20 litre bin. You need only two tailor-made bins to be used alternately and some Bokashi bran, which contains a carefully controlled mixture of beneficial bacteria, yeasts and fungi, that work together to speed-up composting, suppress pathogens (there are no e-coli in a Bokashi composter), prevent putrefaction and eliminate bad odors. As a side effect, the drained-off liquid can be used to keep your drains fresh and patent, and can also be used to nourish your plants and crops.

Fungi

So, the answer is definitely NO, you really do not need to light a bonfire, to wipe out a whole mini ecosystem, and to also possibly kill the ever so popular hedgehog, whose numbers are rapidly declining. One should always endeavour to intervene in order to benefit the sentient beings who are living in nature, and not intervening in nature in a way that harms human and non-human animals.

Pet Cats And Their Impact On Wildlife

Juvenile green woodpecker

According to the British Trust for Ornithology (BTO) cats kill an estimated 55 million birds in Britain every year and such a predation could be contributing to long-term declines of garden birds. Cats also pose a significant threat to endangered mammals, reptiles and amphibians. Studies have shown that alone the presence of cats in the garden is causing directly and indirectly the death of nestling birds, as parents are disturbed, nestlings are not fed sufficiently and third party predators are invited for a free meal.

Robin fledgling
Robin fledgling

Cats are domesticated animals. They are not a natural predator in our existing ecosystem, as they have been brought in existence by humans. It is estimated that UK households owned approximately 10.3 million cats in 2006, strays not being counted. Trap – Neuter – Release programmes are supported by several charities. However, these programmes are only partly addressing the impact cats have on our wildlife, as most neutered stray cats will be returned to ‘the wild’. With regards to wildlife conservation, it would be more efficient to stop breeding and selling cats completely and to focus on a foster system taking care of the existing cat population, to basically get all feral cats off the road.

Cats and Wildlife – eBook

Birds caught alive and being seemingly uninjured should not be released. Please contact an experienced bird rescue immediately, even if the bird seems to be healthy and uninjured. Due to bacteria (Pasteurella multocida) within a cat’s claws and mouth it is essential that the caught bird is seen and treated with antibiotics straight away. If the bird is left for too long, there is a risk of a fatal infection (septicaemia).

Goldcrest fledgling
Goldcrest fledgling

These are sad but proven facts. Fortunately there are solutions available a responsible cat owner can adopt. So what can be done? The best and safest option for a cat and for wildlife is to keep your cat indoors, or in a sufficient stimulating outdoor enclosure. Cats can also have a good time in the garden in a supervised fashion, or even be trained to be walked on a lead. In other words, the cat flap has to go. Collars fitted with bells or ultrasonic devices are widely recommended, but their effectiveness is questionable. To make them work at all bells need to be changed frequently, as cats are able to learn to adapt their movements to avoid to make any noise. As these collars serve the purpose to make cats more obvious to birds, they may simply provoke even more alarm calls during the nesting period, resulting in a higher nestling mortality as mentioned above.

Blackbird fledgling
Blackbird fledgling

It is also recommended to spread out bird feeders so that feeding flocks might spot a cat more easily. The more birds you attract to your garden, the less likely cats are to catch them as there are more pairs of eyes keeping watch. Chicken wire can be placed around nest boxes and thorny vegetation can be planted to help protect nesting birds. In addition, ultrasonic devices, which are triggered by the cat, can help dissuade cats from using certain areas of a garden. Make sure feeders are not too close to possible cat hiding places. If the lid of a bird box is not secure, the nesting family becomes a target. Check twice when you are siting a nest box. Make sure it is not accessible to cats from a branch or the top of a wall.

Great tit fledgling
Great tit fledgling

One of the things you can also do to keep wildlife safe is to keep your cat at least in at night. Sunset and sunrise are the times of day when cats like to go hunting most. These are also the times your cat is most likely to be run over. That way you do our wildlife and your cat a big favour.

An Impressive Encounter Of Cultural Learning In Corvids

Juvenile crow sitting on the fence

Animal culture describes the current theory of cultural learning in non-human animals through socially transmitted behaviours. This involves the social transmittance of a novel behavior, both among peers and between generations of the species concerned.

About six years ago I have been called for help as a fledgling crow has flown into a window in one of the enclosed courtyards of the hospital. When I arrived I found a concussed carrion crow fledgling being cold and wet. The bird also showed nutritional deficiencies and subsequently a poor plumage with many white primaries and secondaries. All these problems made it necessary to take the fledgling bird into our care to treat the immediate concussion issues but also to keep the bird for at least one year to allow a full moult into a new healthy plumage, which only happens once a year. Whilst assessing and securing the crow fledgling I have been closely watched and scolded at by the crow parents, and by another crow sitting in some distance on a roof.

Playing and interacting crows

Crows are territorial birds. The hospital grounds are forming the centre of the crow territory occupied by the pair of crows, whose fledgling I have been asked to rescue. As documened in the literature, the third crow is likely to be a male crow, who has been accepted by the territory holder pair to reside in the outskirts of the occupied territory helping them to defend their home. One year later I have been called again to rescue another crow fledgling which got stuck in an open hospital sewer canal. The poor bird was soaking wet and hypothermic and had to be taken into care as well. As the year before, the parents watched the incident and tried to defend their youngster.

Corvids Never Forget A Face

Ever since the first incident five years ago, as soon as I enter the hospital grounds to go to my work place, these three crows including their offspring will raise the alarm and at least one of the crows will accompany me until I enter one of the buildings and disappear from their sight. Interestingly, it does not matter what clothing I am wearing, they will easily identify me and recognise my face. Even youngsters born the years after the last incident will raise the alarm and join in, as soon as they become independent and are able to fly and follow me. The members of this extended crow family are also able to identify me when I stand seemingly at random behind one of the hospital windows watching them whilst they are doing their daily business.

Adult carrion crow sitting on the fence

This encounter, which demonstrates nicely cultural learning, shows clearly that information regarded as essential and worth keeping is communicated between family members, related and unrelated birds, even years after the actual incident. This lets us conclude that long living animals like crows have some sort of cultural heritage, which is being passed on to future generations. As it is also known that territorial carrion crows will also visit communal roosts, there is also the possibility to consider that some of this or other more essential and useful information of this cultural heritage will also be passed on even further.