Bald Eagle populations have recovered to the point that it was removed from the Threatened and Endangered species list in States in the s, but was not listed federally by the U. Fish and Wildlife Service. As with the Bald Eagle and Peregrine Falcon, the Osprey has recovered in most areas and has been removed from most of the State's Threatened and Endangered species lists. During World War II, pesticides proved successful in combating typhus and malaria, and after the war, modernization of agriculture began to include the use of pesticides to increase crop yields.
One such pesticide; DDT was very effective and its production and use increased to the point that 1. To make a long story short, the DDT that was sprayed on crops, fields and swamps was washed into the rivers, lakes, bays and oceans and got into the food chain.
Peregrine Falcons do not eat fish, but do eat birds that eat fish, so they also began to store DDE in their bodies. In birds, DDE interferes with calcium metabolism, so when they tried to reproduce by laying eggs, the egg shells, which are primarily made of calcium were so thin that they broke when the females set on the eggs to incubate them.
By the time Rachel Carson published Silent Spring in to draw attention to the damage to wildlife caused by pesticide use, it was obvious that populations of Bald Eagles, Peregrine Falcons, Osprey, Brown Pelicans and many other species were decreasing. Even though it has been almost 40 years since the ban on DDT, the pesticide has decreased in most areas, residue can still be found in the sediments of some areas and can still be detected in the tissues of some fish and birds.
Both Bald Eagles and Peregrine Falcons have been tested with high levels of DDE in their tissues, but have proven to be able to produce viable eggs. Other recent studies have shown that eggshells of some species are still thinner than eggshells prior to DDT use.
By the mid s, many raptor biologists and falconers were attempting to breed the Peregrine Falcon in captivity so that young birds could be released back to the wild by a process known as hacking. By the early s, Bald Eagles were also being bred in captivity and being hacked back into the wild. By the early s, Peregrine Falcon populations had recovered to the point that all of the original recovery objectives had been met. Because of extreme caution, law suits and the normally slow action of government, it took until for the Peregrine Falcon to be removed from the Endangered Species Act protection.
Let's hope we will all be wiser in the future than we were in the past and can keep the Peregrine Falcon, Bald Eagle and many other birds of prey from ever being threatened or endangered again.
Birds are not listed in any particular order. Data primarily from iucnredlist. Harrier is a term that is applied to some hawks which are members of the Circinae subfamily. One of the defining traits of harriers is that they hunt distinctly by soaring close to the ground and capturing their prey that usually varies from small rodents such as rats and mice to reptiles such as snakes and other small birds.
Some of the most famous species of harriers include the African marsh harrier, the long-winged harrier, and the Papuan harrier. Falcons are some of the most widespread raptors with a range that covers most of the regions of the world. Ornithologists estimate that there are approximately 40 distinct species of falcons spread across the world. Some of the most well-known falcon species are the Peregrine falcons and the gyrfalcon.
The gyrfalcon attained international recognition because of its size as it is considered the largest of the falcons. The Peregrine falcon, on the other hand, is famous because of its exceptionally high dive speed that in some cases has exceeded miles per hour.
The caracaras are raptors that usually feed by scavenging and the red-throated caracara being a well-known exception. Even though they belong to the Falconidae Family, they are relatively slower than their evolutionary relatives the Falcons. A common buzzard on the hunt. Benjamin Elisha Sawe November 13 in Environment. The 6 Best Antioxidant Supplements of supplements. The best of EcoWatch, right in your inbox. Sign up for our email newsletter! Enter Email Sign Up. Griffon vulture.
EcoWatch Daily Newsletter. Your Email Subscribe. Tiny Hawk Accipiter superciliosus. Semicollared Hawk Accipiter collaris. Red-thighed Sparrowhawk Accipiter erythropus. Little Sparrowhawk Accipiter minullus. Japanese Sparrowhawk Accipiter gularis. Besra Accipiter virgatus. Small Sparrowhawk Accipiter nanus. Rufous-necked Sparrowhawk Accipiter erythrauchen. Collared Sparrowhawk Accipiter cirrocephalus.
New Britain Sparrowhawk Accipiter brachyurus. Vinous-breasted Sparrowhawk Accipiter rhodogaster. Madagascar Sparrowhawk Accipiter madagascariensis. Ovampo Sparrowhawk Accipiter ovampensis. Eurasian Sparrowhawk Accipiter nisus. Rufous-chested Sparrowhawk Accipiter rufiventris. Sharp-shinned Hawk Accipiter striatus. Bicoloured Hawk Accipiter bicolor. Black Goshawk Accipiter melanoleucus.
Northern Goshawk Accipiter gentilis. Chestnut-shouldered Goshawk Erythrotriorchis buergersi. Red Goshawk Erythrotriorchis radiatus. Long-tailed Hawk Urotriorchis macrourus.
Lizard Buzzard Kaupifalco monogrammicus. Grasshopper Buzzard Butastur rufipennis. White-eyed Buzzard Butastur teesa. Rufous-winged Buzzard Butastur liventer. Grey-faced Buzzard Butastur indicus. Crane Hawk Geranospiza caerulescens. Plumbeous Hawk Leucopternis plumbeus. Slate-coloured Hawk Leucopternis schistaceus. Barred Hawk Leucopternis princeps. Black-faced Hawk Leucopternis melanops. White-browed Hawk Leucopternis kuhli.
White-necked Hawk Leucopternis lacernulatus. Semiplumbeous Hawk Leucopternis semiplumbeus. White Hawk Leucopternis albicollis. Grey-backed Hawk Leucopternis occidentalis. Mantled Hawk Leucopternis polionotus. Rufous Crab-hawk Buteogallus aequinoctialis. Common Black-hawk Buteogallus anthracinus.
Cuban Black Hawk Buteogallus gundlachii. Great Black-hawk Buteogallus urubitinga. Savanna Hawk Buteogallus meridionalis. Black-collared Hawk Busarellus nigricollis. Black-chested Buzzard-eagle Geranoaetus melanoleucus. Solitary Eagle Harpyhaliaetus solitarius. Crowned Eagle Harpyhaliaetus coronatus. Roadside Hawk Buteo magnirostris. Red-shouldered Hawk Buteo lineatus.
Broad-winged Hawk Buteo platypterus. Grey Hawk Buteo nitidus. White-rumped Hawk Buteo leucorrhous. Short-tailed Hawk Buteo brachyurus. White-throated Hawk Buteo albigula.
White-tailed Hawk Buteo albicaudatus. Galapagos Hawk Buteo galapagoensis.
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