Alfred Hitchcock was in a way right. Birds can be scary. The nature of the threat, however, can be slightly different than expected. Today we present 10 species of birds that can affect the natural environment. Their ability to cause harm is generally caused by the introduction or support of humans in conjunction with their specifically aggressive natural tendencies and adaptations. Here is the air gallery of our rogue.
10th European Starling
The European Starling mentioned in Shakespeare's works was purposely shipped from Europe to North America … and that was a big mistake. This evil bird has become the most serious threat to the North American environment. Rogue stareers have decimated populations of bluebirds, woodpeckers and swallows as they invade orchards and agricultural fields and form swarms that look like scenes from The Birds . The accumulation of cataract favors the growth of Histoplasma capsulatum, the causative agent of histoplasmosis, a disease that can lead to vision loss and, in some cases, death. Their massive, messy nests are also considered a fire hazard when the fearless birds take over buildings.
It is estimated that a shocking 200 million European starlings live in North America . The black birds are adorned with star-like speckles, hence their unmistakable name, while their sharp yellow bill allows them to easily ship any small bird they are involved in a fight with. Bluebirds and Woodpeckers, popular native birds, are often the worst affected victims of starlings forcing them out of their nests.
. 9 House Sparrow
The House Sparrow, a small, established killer of native birds, comes from the ancient world and inhabits gardens, parks and agricultural landscapes as well as urban street landscapes. The bird was introduced by nostalgic settlers from the ancient world who missed his foraging and chirping, which turned out to be catastrophic on arrival. Loved Bluebird populations began to shrink, while species such as Swallows also suffered attacks. The house sparrow is not a carnivore but it is bad news for nests as it destroys nests and injures or kills nestlings and sometimes adult birds while trying to take control of rare cave nests, natural locations and to get nesting boxes.
House sparrow is one of the most important factors in the decline of native Bluebird species in North America. Since it is small, it is very difficult to exclude Bluebird nests with baffles, while its tolerance for human habitation gives the already ubiquitous bird an added advantage. House sparring control is legal throughout the continent, as it is not a native bird. Do not confuse this species with the many protected native sparrow species in North America, which are more related to bunting, because the house sparrow is actually a weaver finch.
. 8 Canada Goose
The iconic and tall Canada geese are a problem. On the one hand, the species is native to North America, but the birds invade unnaturally large numbers and for long periods in populated areas, supported by human environmental changes. The introduction of large subspecies of the Canada goose – outside its normal range – also led to serious invasion problems, with worst-case environmental damage from stray flocks of locally acclimated geese. Canada geese pose a threat that most threatens human security and the environment. One such species, according to the FAA, is responsible for around 35 percent of aircraft / bird collisions each year, leading to catastrophes that cost many lives.
The forced landing of a Hudson River airliner and a fatal crash in Alaska resulted in 24 people killed, both caused by Canada geese. People often fail to notice that the presence of Canada goose is artificially aggravated by the unknowingly creating habitat in urban and agricultural areas, leading to chronic geese flooding. The damage is enormous. Rogue herds of invasive geese cause erosion and large habitat loss. The voracious geese graze, causing erosion near watercourses, destroying fish and bird habitats, while manure deposits can reach 1.5 pounds per day and bird. The result is that there are no more plants available to filter the water, while the geese droppings feed poisonous algae blooms and encourage chaos. Goose bumps removal and habitat modification to deter geese are often the only answer.
. 7 Mute Swan
Mute swans are native to Europe and Asia, but are widespread worldwide. White swans are known to have a nasty tendency to confront each other, and they occur almost everywhere where they compete with native migratory swans, disturb other waterfowl and plunder the aquatic vegetation. They can also cause serious human injury, such as conflicts in a park. Wetlands with a variety of indigenous species that depend on aquatic plants, such as pondweed can be almost completely cleared of vegetation by wandering white swans . The combination of power and insatiability and the limited threat of adults allows Mute Swans to inflict significant damage unchecked. In addition, an invasive species is often subject to limited competition, while native species are poorly used to resistance.
Why are mute swans in North America? Due to launches that took place in the 19th and 20th centuries and that brought birds from Europe and East Asia for ornamental purposes, only the birds could escape and open a shop. Mute swans are also dangerous, as the drowning death of an unfortunate Chicagoer using the swans to control invasive geese shows. Mallard
The mallard is the epitome of the duck and the ancestor of the native Hofente. It is native to temperate and subtropical zones of North America, South America, Europe, Asia and North Africa. The ubiquitous waterbird has also been introduced in Australia, New Zealand, South-South American countries and South Africa. The green-headed males are the main culprits, as they mate aggressively with females of native plantain, resulting in the depletion of species that are under conservation. In addition, these more aggressive imported ducks can outperform native species in terms of feed, overgrazing and water pollution. Mallards are also carriers of avian influenza as an invasive and pathogen vector species and are considered as a possible cause of a pandemic.
Among the native duck species threatened by the Mallard hybridization and the competition are New Zealand Gray Duck, Mottled Duck, American Black Duck, Hawaiian Duck, African Black Duck, Yellow-Billed Duck and Meller & # 39 ; s duck.
. 5 Rock Dove
Illnesses, airplane raids and the displacement of indigenous species are some of the consequences of massive accumulations of rock pigeons known as city doves or wild doves. In the United States alone the birds annually cause a staggering $ 1.1 billion in destruction in the city and release feces that contaminate urban areas and make buildings acidic. In addition, the birds are damaging agriculture, since cereals destined for human consumption can be irreparably contaminated by pigeon flocks that serve as reservoirs for some noxious bird diseases.
Rock pigeons can carry Newcastle disease and ornithosis and spread salmonella, encephalitis, cryptoccosis and toxoplasmosis, as well as host malignant parasites such as fleas, mites and ticks, which further affect human health when the pigeons gather. Control methods include scar formation, installation of baffles to prevent squatting and nesting, killing by chemical means, shooting and trapping. Rock pigeons are also big enough to crash planes when they get into the plane and, worse still, hang around at airports. The birds are a threat to the extinction of rare native species such as the Galápagos pigeon, which carries the disease Trichomonas gallinae which can kill the rare native birds and damage the poultry flocks.
. 4 American Crow
Crows can destroy the environment if they get out of control. While crows and their relatives are geniuses of the bird world and boast a remarkable intelligence, their skill and intellectual ability, coupled with adaptability and aggression, are problematic for many indigenous species, farmers and urbanites alike. Migratory crow groups, known as killers, can spread bird diseases like the West Nile virus and loot crops in a relatively short time. Crows are also capable of harming young or young cattle.
The change in human habitat has increased the number of crows and the ratio of marginal habitat to interior habitat has allowed crows to ambush bird nests (which otherwise would have been protected by deep forests) with ease. At the same time, habitat changes that increase waste harvesting and the presence of unsecured garbage and discarded food can attract crows that gather and give them better access to prey. Despite their ability to cause disproportionate damage, crows in the ecosystem play a role as guardians and valuable scavengers. We just do not want to encourage them to excess.
. 3 Common Grackle
Common North American Common Grackle is a large songbird that eats just about anything. Why should it be a problem? Human environmental impacts have increased Grackle's feeding and breeding potential, allowing them to conquer new areas and gain deeper access to natural areas where they can cause a bit of chaos, eat other native birds and plunder crops. While the Grackles are technically songbirds, they are more like a half-baked imitation of a bird of prey in its migratory hunt, eating birds, nestlings, small fish and amphibians, and small mammals.
The birds can also dump large quantities of feces in urban areas Steal food outside restaurants Attack patrons and even mob people in groups when their nests are guarded. Groups of gracils are often referred to as "Grackle plagues" and can cause significant damage if they enjoy crops, regardless of the effort to stop their attacks. Tame birds of prey and chemical control agents controlled the threat posed by the growth of the Grackle population and the expansion of its range.
. 2 Red-billed Quelea
The small, sparrow-headed red-billed quelea, an agricultural birdwatch of unprecedented proportions, has been promoted on the African continent by the expansion of human agriculture, which in turn allows it to inflict greater abundance and damage due to its damage Reach. As a member of the weaver family this widespread African songbird with 1.5 billion inhabitants is the most abundant wild bird in the world. Common control methods against species include incendiary bombs and chemical sprays, which have a major impact on agriculture. One has to witness the living clouds that form the birds as a group at the start, to fully capture the large number of such small birds.
The red-billed quelea, often referred to as the "feathered grasshopper," is considered the most destructive bird in the world because of its threat to human food security. The birds can reproduce at extraordinary speeds as they can produce three pups per year, each with three pups, for a potential total of nine chicks per year.
. 1 Brown-headed Cowbird
North America's proliferating response to the Eurasian Cuckoo. The Brown-headed Cowbird has evolved to lay its eggs in the nests of other birds. The problem is not entirely natural. These birds once followed bison, so they could not look after their young, but left them in the care of other birds. When people cleared land on a large scale, the cowbirds responded with increasing numbers and gained new access to countless new bird populations. Now they are endangering [1965-9013] the survival of indigenous bird species and are subject to culling programs to mitigate the threat.
Habitat change with the hope of reducing the suitability of natural areas for cowbirds is also used to protect native birds from the onslaught of these nest parasites. Shiny black with a brown head, the male cowbirds look subtly good, while the females have a monotonous brown color. Both sexes are fairly reserved in breeding and avoid being noticed by their victims. Once laid, the cowbird egg is incubated until it becomes an insatiable eater, often causing the victim's real boys, his unfortunate nestmates, to starve to death. Species such as the formerly endangered Warbler of Kirtland are among the most endangered species. They have a small population and are too "naive" to push the cow bird eggs out of their nest.