Pacific Golden Plover, the true 'Home Alone' in Alaska
Male Golden Plover Hey Dad, wait for me!!
The young of the Golden Plover are left in Alaska by their parents for a first time and a leisurely 88 hour 2500 mile trip home to Hawaii! How? The young plovers, which are only about two months old arrive about two weeks after the adults". (1)
http://www.kilaueapoint.org/education/naturefocus/hnf3/index.html (1)
Blackpoll Warbler - the little bird with a marathon attitude!
Blackpoll Warbler migration route, the Atlantic hop is accomplished in 100 hours!
This North American avian has figured out an express way of getting to its winter refuge in Venezuela. The bird fattens itself up before taking a ride on a southern trade wind, sailing from the Northeastern U.S. to South America in a hundred hours—entirely over the open ocean. On the way back home against the wind, the bird takes the more scenic route, stopping to land, rest and refuel.
Ruby Throated Hummingbird
When the Ruby-Throated Hummingbirds are flying over the Gulf of Mexico during migration, there is no place to land to sleep, so they must keep on going. It's amazing to think that these little tiny guys would travel over 450 miles of water, sometimes with a 20 mph headwind for over 20 hours of travel time. Gorging the days before the trip, they go into hibernation the night prior to conserve energy for this marathon to their favorite breeding grounds. (1) http://www.worldofhummingbirds.com/migration.php (1)
Marine Mammals - Evolutions big problem (with sonar and teeth)
The Killer whale in action, an intelligent creature for sure!
Beauty in form and striking in color, an accident of mutations? In truth, while attacking in low light or in the depths, these markings aid the whales in identification of friend or foe, and the eye patch directs adversaries away from their eyes in a fight, stunning!
Sonar Equipment
Transmission and echo reception of the Killer Whale
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The forehead melon acts to beam and focus transmissions, current research suggests it may also function as a angular director. Operation frequencies are 10-80 Khz (80,000 Hz), varied by the whale to achieve optimum range and target discrimination - even specie specific fish! Most basic ship depth and fish locators operate at 50Khz, invented by Reginald Aubrey Fessenden,(1) who also invented the first AM radio transmitting on December 24, 1905, playing "silent night" on his violin and reading the Christmas story from Luke 2. He went on to invent the sonar for the the WW1 war effort, used to detect U boats. All these systems operated @ 50Khz, the optimum Killer Whale channel!
http://www.ieee.ca/millennium/radio/radio_radioscientist.html (1)
The lower jaw bone acts as the receive antenna for the sonar band, connected to a complex nerve bio-apparatus, the Audio Bulla as shown. Receive range is from .25 - 125 Khz (125,000 hz). Whales also have ears for communication receptors. Man-made sonar's are unable to vary in frequency due to fixed sonar puck resonance. Killers may also vary the "ping" interval for better target definition within large schools of multiple species of salmon, Chinook Salmon seem to be a fav for dinner. Ping duration maybe is a mere 1ms (millisecond = 1/1000/Second). Killer whale communications are complex and individualized, pods have been found to have unique dialects. Researchers recently stated "The more information we obtain on their ability to manipulate the beam," Houser said, "the more complicated the story becomes. (1)
"http://news.nationalgeographic.com/news/2008/11/081117-killer-whales-sonar.html (1)
A Furuno CH-12 Scanning color sonar display/control unit. This sonar comes in 66, 88 or 150 Khz versions. The author installed the first unit in Alaska in the 1980's on the F/V Osprey with great success. It is limited compared to the sonar found in toothed whales, as it has no two-way communications nor instantaneous frequency shift or pulse-width capabilities. Whales may simultaneously sonar scan, depth find and communicate with each other.
Watch these animals in action; http://www.youtube.com/watch?v=LriiZmG9BBY
Sounds; http://www.dosits.org/audio/marinemammals/toothedwhales/killerwhale/
Killer Whale migration of the Pacific Coast Pack
I hate Killer Whales!
Marine Mammal Evolution? Use your Imagination!
The evolution story for marine mammals claim some type of bear stayed in the water to long, lost it's fur, then it's nostrils slowly migrated to the top of its head over millions of years of evolutionary magic. Where the dorsal fin came from is left to your imagination. Even Darwin promoted this idea, creative, but no basis in science. Whales also have special eyes that see well on the surface, specialized eye slave chemistry and many more complex senrory systems . Considering the whales complex and unique sonar and acoustic systems described here (that no land mammal employs), what a testimony to a Super Intelligence trumping mans best devices, and confounding evolution theory, unless your imagination has lost touch with reality.
Look out! turn into a Wasp!!! Look out!! turn into Bat!!!
Countermeasures in the night Sky!!
New research has uncovered an amazing relationship between Tiger, Hawk Moths and Bats. It's been found that these moths, the bats fav dinner, can actually sense and then jam a bats radar! When the moth senses the radar frequency, it fly's evasively and then vibrates a signal that jams the bats radar and mimmic's an insect detestable to the bats taste! These are referred to as electronic countermeasure's in military lingo! Males and females use different vibration techniques.(1) Many systems in the Biological world are an image of our most advanced technologies!
http://www.scientificamerican.com/article.cfm?id=sonar-jamming-tiger-moths-bats-echolocation-defense (1)
Click the task bar on the top RH side to select the next topic posts for Sept and Oct and view all 17 topics!. Thank you!
Copyrights 2014 by Mark D. Rose All rights reserved
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