This video says about itself:
12 April 2013
Original documentary about the annual migration of billions of songbirds across the Gulf of Mexico and into North America. Features HD footage of hundreds of colorful songbirds.
Try watching in HD: 720 or 1080p full screen (with fast connections). 1080p is the very highest quality for this movie and looks great!
It seems like the video loads with the player in the middle of the movie, so you have to move it back to the start.
GULF CROSSING: STORY OF SPRING
In the spring hundreds of bird species move from the tropics into North America. As they make their way they eventually face the great barrier of the Gulf of Mexico. This arm of the atlantic ocean is more than 900 miles wide, and more than 600 miles across from north to south.
While some birds skirt the edge of the water, the overwhelming majority-more than 200 species, and hundreds of millions of individuals-cross the unbroken plain of the gulf in a single flight of 20 or more hours.
Gulf Crossing is a record of trans-gulf migration on America’s southern coast: the expectation of arrival, the surprise each day of what birds appear, and the habitats they are found in. The experience is expanded by a scientific perspective on the phenomenon of migration, describing it’s geographic shape, the coastal habitats birds rely on, physiological cycles in birds, and the effect of weather patterns on bird flight.
Bird migration along the gulf coast is one of the most exciting and powerful natural experiences you can have. Millions of birds from hundreds of species are passing overhead each day, and you never know what’s going to show up. But despite the hundreds of nature documentaries that are made each year, the story of trans-gulf migration has never really been told before.
Gulf Crossing is an attempt to document this remarkable and moving natural phenomenon. The six episodes provide a comprehensive exploration of the Gulf crossing, from Spring to Fall, covering migration along the Upper Texas Coast, the arrival and breeding of birds in the north, and Fall migration in north Florida.
I hope this documentary will increase awareness and appreciation of America’s immense but vanishing natural heritage.
Gulf Crossing is free to use in any classroom or group setting. For more info on use, see the Creative Commons License. If you are interested in downloading the file to show to groups, please contact me.
The tiny transmitters tracking birds from North to South America
By Ed Parnell, 10 Feb 2017
The Motus Wildlife Tracking System is a pioneering programme of Bird Studies Canada (BSC, BirdLife Partner), in partnership with collaborating researchers and organisations. Motus (which means “movement” in Latin) utilises miniaturised radio transmitters weighing less than 0.3g, which can be unobtrusively fitted onto the backs of birds, including small passerines such as warblers. (Even smaller transmitters have also been developed that can be fitted to insects: for instance, one study already underway is tracking the movements of Monarch butterflies Danaus plexippus).
The transmitters, or tags, emit a short burst or pulse every 5–30 seconds, each with a unique numerical pattern. These pulses are then picked up by automated very high frequency (VHF) receivers, which can automatically detect and record signals from the tags at distances of up to 15 km.
Thousands of tags can be simultaneously deployed and tracked within the system, which, as of today comprises nearly 350 receiving stations. Resembling oversized television aerials, the receivers can be fixed to existing structures such as towers or lighthouses, on trees, or on stand-alone poles that are around 30 feet in height. The receivers can also be located out to sea; some receivers have already been placed on offshore oil and gas platforms in coastal Nova Scotia, Canada.
“What’s new and exciting about Motus is that it harnesses the collective resources and infrastructure of numerous researchers into one massive collaborative effort. Indeed, it is the depth of these collaborations that makes the entire system possible”, explains Stuart Mackenzie, Motus Programme Manager for BSC.
As birds—or other animals, such as bats and large insects—pass within range of any receiver in the network, data is recorded automatically into BSC’s central database in Ontario, where it is shared with researchers. “As each tag has a unique signature we can extract a massive level of detail about movement and behaviour, including learning where and how quickly the bird in question has travelled, and for how long they may have stopped en route”, says Mackenzie.
A large number of individual study projects are currently underway that utilise Motus’ open source technology. These include: studying the stopover and migration ecology of various waders (including Red Knot Calidris canutus, Semipalmated Sandpiper Calidris pusilla and White-rumped Sandpiper Calidris fuscicollis); monitoring the migration routes of Grey cheeked Thrush Catharus minimus and Swainson’s Thrushes Catharus ustulatus; and investigating the post-breeding dispersal of Ipswich Sparrow, the princeps sub-species of Savannah Sparrow Passerculus sandwichensis which breeds only on Sable Island, Nova Scotia.
One of the big advantages of Motus over other methods of tracking bird movements —such as ringing (banding) or the use of geolocators or other archival tags – is that Motus-tagged birds don’t have to be recaptured in order for the data to be accessed. Indeed, Mackenzie estimates that the chances of recovering data from a tagged Motus bird is something like a thousand times greater than with traditional ringing recoveries.
“With the 2015 project that studied migratory Grey-cheeked and Swainson’s Thrushes on their Colombian wintering grounds, migration data was obtained from around 30% of the birds involved—19 out of 67 tagged birds—an unprecedented figure compared to previous transcontinental migration studies”, says Mackenzie.
A striking level of insight is already being gleaned into the movements of thrushes. For instance, a Swainson’s Thrush tagged on 19 March 2015 remained at the Colombia study site, a shade-grown coffee plantation, until 14 April. On 18 May, it was detected flying past a small array of towers in Canada’s Chaplin Lake in Saskatchewan, an astounding journey of nearly 6,000 km in just 34 days; this equates to flying at least 175 km per day for a month. And one of the study’s Gray-cheeked Thrushes travelled over 3,200 km from Colombia to Indiana in just 3.3 days, meaning it flew an average of 986 km a day.
Motus is poised to expand rapidly over the next few years. Until recently most of the MOTUS equipment was located in North America, mostly around eastern Canada and the United States. However, a collaboration with BirdLife Partners Audubon Panama and Guyra Paraguay has seen the Motus’ networks of antennas stretch to Central and Southern America for the first time.
“This really is a project with global potential”, explained Mackenzie. “Perhaps one of the most exciting developments in 2016 is the deployment— working alongside Audubon Panama – of receivers across the canal zone of Panama, meaning that most tagged birds that migrate from North to South America will have to cross through and be recorded by the Panama Gateway.”
In Paraguay, a South American country that has documented more than 40 migratory species arriving from the northern hemisphere, we’ve pinpointed the ideal location to track their arrival. Thanks to the support of the Municipality of Asuncion, Guyra Paraguay has installed the first Motus tracking station in the southern cone in the Bay of Asunción, above the office of the Municipal Tourist Information Centre, a strategic place for the antenna on the coast with open view to the Bay of Asunción and the Paraguay River. Later, it is planned to expand the system to Guyra Paraguay reserves, along the Paraguay River and other key areas for migratory birds such as the Salt Lagoons in the central Chaco plains.
In addition, Motus now has a foothold in Europe, with the tagging of songbirds taking place on the German island of Heligoland. With receiver coverage now expanding around the Gulf of Mexico and America’s Pacific Flyway, use of this groundbreaking technology is picking up pace, and enquiries have been made from as far afield as Australia as the world seeks to increase its understanding of the movements of our planet’s incredible migratory birds.
This video says about itself:
23 January 2017
A penumbral eclipse is a tease, with none of the Moon entering Earth’s dark umbra as happens. But the one that occurs on February 10-11 will be about the best penumbral eclipse possible, as the Moon’s northern limb will miss the umbra by only about 100 miles (160 km). So the penumbral shading will be obvious.
This is a very deep penumbral eclipse. It has a penumbral eclipse magnitude of 0.9884 and a penumbral eclipse duration of 259.2 minutes.
During this type of eclipse the Moon will darken slightly but not completely.
The ideal spot to watch this penumbral eclipse is from Europe, Africa, Greenland and Iceland where the whole eclipse takes place at late night in a dark sky. For the most of of North America, the moon will be in eclipse at moonrise (sunset) on February 10 and will be obscured by evening twilight. In Asia, the eclipse will be obscured by morning twilight on February 11 and will be in eclipse at moonset (sunrise) February 11.
The penumbral lunar eclipse will be visible from Europe, most of Asia, Africa and most of North America.
Regions seeing, at least, some parts of the eclipse: Europe, much of Asia, Africa, North America, South America, Pacific, Atlantic, Indian Ocean, Arctic, Antarctica.
Clips, images credit: ESO, ESA/HUBBLE & NASA/JPL
From eNature Blog in the USA:
Watch The Moon Disappear Before Your Eyes—Don’t Miss This Friday’s Lunar Eclipse!
Posted on Tuesday, February 07, 2017 by eNature
There’s a penumbral lunar eclipse happening across all of North America the evening of Friday, February 10th.
The full moon will get noticeably less bright as it moves out of the sun’s direct light and into the Earth’s shadow shortly afternoon sundown on the East Coast.
What Exactly Is A Penumbral Eclipse?
The shadow of the Earth can be divided into two distinctive parts: the umbra and penumbra.
Within the umbra, there is no direct light from the sun. However, as a result of the Sun’s large size compared to the Earth, some solar illumination “bends” around the earth and is only partially blocked in the outer portion of the Earth’s shadow. That outer portion is called the penumbra.
Think of the shadow the Earth makes from the sun’s light as looking a bit like a dart board— with the dark umbra as the bulls eye and the less dark penumbra as the first circle surrounding the bulls eye.
A penumbral eclipse occurs when the moon passes through the Earth’s penumbra. The penumbra causes a subtle but clearly visible darkening of the moon’s surface.
A special type of penumbral eclipse is a total penumbral eclipse, during which the Moon lies exclusively within the Earth’s penumbra. Total penumbral eclipses are rare, and when these occur, that portion of the moon which is closest to the umbra can appear somewhat darker than the rest of the moon.
During Friday’s eclipse most, but not quite all, of the moon will enter the penumbra and observers should see a distinct darkening of the moon as the Earth’s shadow reduces the amount of sunlight hitting the moon.
It’s Safe And Easy To Observe
Unlike a solar eclipse, which can be viewed only from a certain relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of the Earth. A lunar eclipse lasts for a few hours, whereas a total solar eclipse lasts for only a few minutes at any given place, due to the smaller size of the Moon’s shadow.
Also unlike solar eclipses, lunar eclipses are safe to view without any eye protection or special precautions, as they are dimmer than the full moon.
It Starts Around Dinner Time
The eclipse will start to be noticeable a bit after 6:00 PM on the East coast (it actually begins at 5:32 PM) when the Moon’s leading edge enters Earth’s penumbra. You can do the math and see the timing is a little less friendly for readers on the West coast— but things should be be quite visible if the sky is clear.
The eclipse will last more than four hours and will be visible early Saturday in Europe, Africa and western Asia as well as North America.
Initially, the effect is not especially noticeable. You won’t start to see a dusky fringe along the Moon’s leading edge (known to astronomers as its “celestial east”) until the the moon intrudes about halfway across the penumbra. But keep an eye on the moon and your patience will be rewarded.
Watch Online If Your Local Weather Doesn’t Cooperate
If the weather isn’t so nice, or you just prefer to watch from the comfort of home, SLOOH will broadcast a live webcast. The webcast will start at 5:30 PM. EDT and you can watch it by clicking here.
There’s A Comet Out There Too!
Comet 45P will zip by Earth early Saturday morning. It will be an extremely close encounter as these things go, passing within 7.7 million miles (12.4 million kilometers) of Earth moving at 14.2 miles per second, or an eye-popping 51,120 mph.
The comet, glowing green, will be visible in the constellation Hercules. Binoculars and telescopes will help in the search as it will be quite difficult to see unassisted.
Astronomers have been tracking Comet 45P for the past couple of months. The icy ball — an estimated mile across — comes around every five years. It’s officially known as Comet 45P/Honda-Mrkos-Pajdusakova, named after the Japanese, Czech and Slovak astronomers who discovered it in 1948. The letter P stands for periodic, meaning it’s a recurring visitor to the inner solar system.
Regardless of the hour, you’ll not regret making time to catch one of nature’s best shows!
What are your plans for watching the eclipse? Or catching the comet? We’re planning to keep the kids up here…
Use Time and Date’s Eclipse Calculator to see when it’s visible in your town.
This video from the USA says about itself:
5 December 2016
Habitat loss throughout the Americas is threatening entire suites of migratory birds. Flyways are fraught with growing, man-made threats: wind energy projects sited in migratory pathways, toxic pesticides, reflective windows, free-roaming cats.
Falling bird numbers tell the story. If you have been a bird lover for a while, you have noticed. Migratory birds are in trouble, and we must act. Will you donate today to help us lift up migratory birds? Your gift between now and December 31 will be matched dollar-for-dollar up to $500,000.