Effect of climate change on migration of birds A Presentation ByMr. Allah d...Mr.Allah Dad Khan
Effect of climate change on migration of birds A Presentation ByMr. Allah dad KhanVisiting Professor the University of Agriculture Peshawar allahdad52@gmail.com
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Effect of climate change on migration of birds A Presentation ByMr. Allah d...Mr.Allah Dad Khan
Effect of climate change on migration of birds A Presentation ByMr. Allah dad KhanVisiting Professor the University of Agriculture Peshawar allahdad52@gmail.com
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Marine Birds Marine birds are those living in and making their living from the marine environment, which includes coastal areas, islands, estuaries, wetlands, and oceanic islands.
Consists of 328 species.
Sphenisciformes -Penguins
Procellariiformes -Albatrosses, petrels, storm-petrels, fulmars, shearwaters
Ciconiiformes - Herons, egrets, storks, ibis, spoonbills
Pelecaniformes - Pelicans, frigatebirds, gannets, boobies, cormorants, anhingas
Charadrii formes - Shorebirds, skuas, j
migration is the movement of animal from one place to another and the migration is occured in all group of animals it include mammals invertebrates amphibians reptiles fishes birds...
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Marine Birds Marine birds are those living in and making their living from the marine environment, which includes coastal areas, islands, estuaries, wetlands, and oceanic islands.
Consists of 328 species.
Sphenisciformes -Penguins
Procellariiformes -Albatrosses, petrels, storm-petrels, fulmars, shearwaters
Ciconiiformes - Herons, egrets, storks, ibis, spoonbills
Pelecaniformes - Pelicans, frigatebirds, gannets, boobies, cormorants, anhingas
Charadrii formes - Shorebirds, skuas, j
migration is the movement of animal from one place to another and the migration is occured in all group of animals it include mammals invertebrates amphibians reptiles fishes birds...
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Climate change is threatening species right in your back yard. This year's State of the Birds report from Audubon and others chronicles how shifting global temperatures are changing the habitats, ranges, and populations of birds across North America.
Why did eagle populations decline in the 1960s Why do eagles cong.pdfvikasbajajhissar
Why did eagle populations decline in the 1960\"s? Why do eagles congregate at the Shepaug
River and Hudson Rivers in winter? When do they reproduce? What are their nests like? How
many young do they have and when do they hatch out? What types of behavior do adult eagles
engage in in winter? What percent of the time do they spend searching for food? What habitat
do they prefer for nesting sites? Why?
Solution
Answer:
1. Why did eagle populations decline in 1960s: Different reasons contributed to a steep decline in
Eagle population in 1960s:
- More than 100,000 bald eagles were killed in Alaska from 1917 to 1953 as Alaskan Salmon
fisherman feared that Eagles were a threat to the Salmon population
- In the 1950’s the insecticide DDT (dichlorodiphenyltrichloroethane) was introduced and used
widely to combat a broad spectrum of insect pests. DDT was indiscriminately used and it caused
serious environmental effects DDT interferes with the calcium processing of birds and results in
deformed eggshells. The chemical by products of DDT persisted in the aquatic ecosystem long
after its application. Since bald eagles are at the top of the aquatic food chain and feed primarily
on fish, they received concentrated doses of the chemical. When the female eagle laid a thin,
deformed eggshell, she crushed it under her own weight when incubating the egg. Since bald
eagles pairs breed only once per year, with many bald eagle pairs not reproducing successfully,
the bald eagle population declined steeply throughout the 1960’s and 1970’s.
2.Why do eagles congregrate at the Shepaug River and Hudson river in the winters.
The same elements that support breeding pairs - clean air and water, ample food supply, large
undisturbed stands of trees - also attract bald eagles looking for a winter home.
The Hudson River region still provides tracts of relatively undisturbed land for roosting,
perching and nesting.These habitats are especially attractive during winter, when human activity
is limited.
Each year, bald eagles migrate from their northern nesting areas to New York\'s rivers and
reservoirs in search of open water, food and roosting sites. Even during the coldest months, open
water can be found near power plants that discharge water during energy production, or where
the natural flows of tributaries enter the river. In recent winters, more than 100 wintering eagles
have been counted along the lower Hudson.In recent years, the stretch of the Hudson from
Kingston to Croton has been increasingly popular with bald eagles, probably because sections of
the river are kept open by discharges from power plants, and railroad tracks provide an ample
supply of dead animals (carrion) for scavenging eagles.
3. When do they reproduce? What are their nests like? How many young do they have and when
do they hatch out?
An eagle is sexually mature and ready to breed at about 4 to 5 years of age. For bald eagles, the
complete white head and tail are signs of sexual maturity. Golden eagles.
Birds are some of the most fascinating creatures on the planet, with over 10,000 species worldwide. They come in all shapes and sizes, from tiny hummingbirds to massive eagles.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
2. Ducks follow ancient pathways from their breeding grounds to wintering areas. Each fall, millions of ducks migrate south to warmer regions in search of food and habitat. We don’t know for certain how ducks navigate during migration, but scientists believe the birds take cues from the position of the sun, moon, and stars in the sky; geographic landmarks like rivers and mountains; and magnetic fields invisible to the human eye. Banding research helped waterfowl managers map the major migration corridors followed by ducks, which are known today as flyways. North America is divided into four flyways—the Atlantic, Mississippi, Central, and Pacific.
3. Stretching from the Arctic tundra of Baffin Island to the Caribbean, the Atlantic Flyway spans more than 3,000 miles. The easternmost flyway is composed of the states of Connecticut, Delaware, Florida, Georgia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia, and West Virginia; the Canadian provinces of Newfoundland, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, and Quebec; and the territory of Nunavut. The Atlantic is the most densely populated of the four flyways.
4. The Atlantic flyway is known as a migration path for dozens of species of ducks. The following list includes some of the more common ducks found along the flyway:Mallard DuckBlack DuckGreen-winged TealAmerican WidgeonGadwallPintailGreater ScaupRedheadRing-necked DuckRuddy DuckBuffleheadLesser ScaupShovelerCommon GoldeneyeCommon MerganserHooded MerganserRed-breasted merganserOld SquawBlack ScoterWhite-winged ScoterSurf Scoter
6. The Prairie Pothole Region is the core of what was once the largest expanse of grassland in the world, the Great Plains of North America. When the glaciers from the last ice age receded, they left behind millions of shallow depressions that are now wetlands, known as prairie potholes. The potholes are rich in plant and aquatic life, and support significant populations of breeding waterfowl. The Great Plains and Prairie Pothole Region are number one on the twenty five most important waterfowl habitats on the continent.
7. Importance to waterfowl Millions of ducks pass through the PPR each spring, nesting in the grasslands. Nest success and hen mortality during breeding are the most important factors responsible for change in mid-continent duck populations. The PPR provides important breeding habitat for pintails, mallards, gadwall, blue-winged teal, shovelers, canvasbacks, redheads and many more species of ducks.
8. Waterfowl Life Cycle In the course of one year a duck experiences all the seasonal changes that presents many opportunities and challenges.
9. Brood RearingThe more time a hen spends taking care of young ducklings, the less time she has to take care of herself. This precious balance must be met to maximize both the hen's and ducklings' chances of survival. To keep ducklings healthy a hen must brood or keep ducklings warm until they can do it themselves, help ducklings find a good source of food, ensure family bonding as a unit and finally, guide young ducks during migration and help them locate staging and wintering habitat.The most important time in a duckling's life is the first two weeks of life. This is when the hen must put in the most energy to keep her ducklings together and safe. A hen's chance of suffering from death increases when she is defending her ducklings Post Breeding Ducks are required to find energy sources to fuel the activities of raising a brood, keeping themselves healthy and re-growing feathers during molt. These energy-expending activities take place during the post breeding period.Scientist speculate that the reason for there being more drake (male) ducks than female's (hens) in the population is the result of the higher deaths that occur to hens during the post breeding period.During the post breeding period ducks can experience nutritional stress. Nutritional stress is a situation where nutrients demanded by the body exceeds the amount of nutrients a duck is able to find and eat.Protein nutrients are extremely important, especially amino acids, the building blocks of life. Waterfowl select specific foods high in proteins, like bugs, solely because of their nutritional value. The post breeding period coincides with the time of year when insects are most numerous
10. Molting Molting is the process of replacing worn feathers. Ducks molt in the late summer and in the early spring.During the fall ducks molt synchronously, or lose and replace all of their feathers in a short period of time. Synchronous molting causes ducks to not be able to fly during a portion of this time putting them at a great risk to predators until the new feathers come in. Losing and replacing all of their feathers can take up to two weeks. The new feathers are drab in color and considered a duck's basic plumage. In the early spring just as the breeding season gets underway a partial loss of feathers happens when the male ducks put on their alternate plumage.Feathers are largely made up of proteins and accounts for almost one-third of all protein in the body. The need for large quantities of high protein food is one reason that male ducks and unsuccessful nesting hens leave the breeding grounds for special molting grounds far away, reducing competition for limited protein resources
11. Fall Migration Ducks migrate long distances from wintering grounds to breeding areas and back again to the wintering grounds with visual and non-visual cues. Visual cues that ducks use include the sun, polarized light, stars, and even landmarks. Ducks use the axes of polarized light to determine the position of the sun and perform sun compass orientation. Navigation at night requires migrants to use stars to orient their direction. Experiments performed in planetariums have shown scientists that some ducks actually use a stellar map to find their way around in the night. Landmarks may be important for navigation, not as compasses, but as directional cues. Coastlines, mountain ridges and waterways such as the Mississippi River are major topographic features that may be considered landmarks.One non-visual cue in navigation is the Earth's magnetic field. When the Earth's magnetic field is obstructed migrating birds often change or alternate direction and altitude. Homing, another non-visual cue, is a ducks ability to find its way home when released in an unfamiliar place or direction. The ability to navigate over many miles from breeding to wintering grounds is truly a great adaptation.
12. Wintering Ducks spend much of their time in the southern portions of the United States and along the coastal fringes where weather conditions are mild. They leave northern nesting areas and head for a warmer climate for several reasons, least of which is because the weather is cold.During much of the winter ducks loaf about eating and storing up nutrients in preparation for the long trip back to the breeding grounds.Waterfowl can withstand very cold temperatures, but when their food source is eliminated they must leave northern areas in search of mild temperatures. When shallow ponds or lakes freeze over with ice ducks can no longer reach aquatic plants and insects for meals. Ducks that feed on seeds or waste grain must also leave the area when snow falls cover their foods.Ducks winter in mild areas where food is plentiful and the water rarely freezes.
13. PrenestingThe female duck always makes the choice for the breeding area because she is homing to the site of her birth or a site where she successfully hatched a nest.
15. Winter Habitat Needs By the middle of December, most waterfowl on the Atlantic Flyway have reached their wintering grounds across the southern half of the United States. The most important biological need of wintering ducks is food. Wintering areas offer a diversity of habitats that ducks use to meet their food or energy needs, including moist-soil emergent wetlands, forested wetlands, coastal marshes with beds of submerged aquatic vegetation, and flooded agricultural fields. Habitat needs vary over winter by species and location. Daily energy demands differ by species, but a typical mallard-sized duck generally requires about 290 kilocalories of food per day throughout winter. Wintering waterfowl congregate in areas with an abundance of foods that will provide them with the energy they need to survive. Ducks also begin the courtship process and often select mates while still on the wintering grounds.
18. Every year the U.S. Fish and Wildlife service and agencies ran by the states, place leg bands on a variety of ducks across the country. The U.S. Fish and Wildlife service uses data reported from leg bands to track the flight paths of these migratory birds. Bands are also useful in determining harvest information and life span of specific duck species. Each band has a unique number that identifies the species of duck which is tied to the life history. Roughly 3.1 million leg bands have been reported to date. That is pretty small considering that since 1904 about 58 million birds have been banded in North America.