Navigation Links
Birds migrate together at night in dispersed flocks, new study indicates
Date:7/7/2008

using low-power-density tracking radar. The radar directs microwaves in a narrow cone a "pencil-beam" that can be pointed at virtually any target within range.

"If there is a bird target here, you can see it on the radar display as an echo," Larkin said. "You throw a switch and it locks onto the target, it tracks the target, and wherever the bird flies, the radar points at it."

The radar kept track of a target's distance (from the radar), altitude and direction of travel over time. It also provided data used to calculate the frequency of a target's wing beats. Since the radar could also track flying insects and other arthropods, the wing beat data would be important for distinguishing birds from bugs.

In collecting the data, Larkin, Szafoni and colleagues had used the radar in a new way. Once the radar operator had identified a flying object that might be a bird and began tracking its flight, he or she looked for other objects entering the radar's beam. If another potential target appeared, the radar could follow it for a few seconds before switching back to the first. By repeatedly switching back and forth between two targets, the operator could potentially detect the discrete flight details of two birds at a time.

Determining whether two birds were actively traveling together was tricky, Larkin said.

"Even back in the 1970s it hit me that you can have two birds flying absolutely parallel in the same direction and at the same height, but they can be flying at such a different speed that one of them gains on the other and they're just, you know, automobiles passing on the expressway," he said. "They're simply taking the same route and not keeping together."

Similarly, two animals may be going at similar speeds but at a slightly varying angle to one another.

"After a while they would be kilometers apart," Larkin said. This would be clear evidence that the birds were not traveling together.

After
'/>"/>

Contact: Diana Yates
diya@illinois.edu
217-333-5802
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Want to fly? Dont copy the birds and the bees
2. Killer whales, blind bats, discriminating dolphins, mating birds
3. Migrating songbirds learn survival tips on the fly
4. Birds migrate earlier, but some may be left behind as the climate warms rapidly
5. Bee species outnumber mammals and birds combined
6. Genetic sequencing of protein from T. rex bone confirms dinosaurs link to birds
7. Asian waterbirds stage remarkable comeback
8. Some migratory birds cant find success in urban areas, study finds
9. Birds, bats and insects hold secrets for aerospace engineers
10. High degree of resistance to antibiotics in Arctic birds
11. Siberian jays can communicate about behavior of birds of prey
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Birds migrate together at night in dispersed flocks, new study indicates
(Date:8/20/2014)... honeybees grows to about 4,000 members, it triggers an ... of a special type of comb used for rearing ... the Department of Neurobiology and Behaviour at Cornell University, ... cycle of honeybee colonies. The results are published in ... . , Reproduction isn,t always a honeybee colony,s ...
(Date:8/20/2014)... POINT ROBERTS, Washington , August 20, 2014 /PRNewswire/ ... in Addressing Security Concerns in the Payment Industry?   ... covering leading sectors including biometrics, issues commentary from analysts and ... Jason Peaslee , Managing Partner at Thrive Analytics, Isabelle ... , CEO of NXT-ID, Inc. (OTCBB: NXTD) ( OTCQB:NXTD ), ...
(Date:8/19/2014)... 19, 2014 To improve students, chances of ... the University of Houston (UH) implemented a comprehensive ... at risk for failure. , Through a ... (THECB), the Department of Biology and Biochemistry embarked ... taking "General Biology" for non-majors and "Introductory Biology" ...
Breaking Biology News(10 mins):Worker bees 'know' when to invest in their reproductive future 2Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 2Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 3Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 4Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 5Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 6Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 7University of Houson program earns kudos for improving grades, retaining students 2University of Houson program earns kudos for improving grades, retaining students 3
... anti-cancer therapy by blocking the molecular motors involved in ... by young Dutch researcher Dr. Nynke Dekker in one ... the European Science Foundation (ESF) and the European Heads ... are trying to stop tumor development by interfering with ...
... tea dramatically boosted production of a group of ... of these beneficial proteins, according to researchers at ... in the August issue of Cancer Epidemiology, Biomarkers ... for Cancer Research, suggest that a green tea ...
... be harmful, if not deadly. While the desire for these ... play an important role. The etiology of these desires is ... Adoption and twin studies have shown that the use of ... provided evidence that ones sex can influence the genetic factors ...
Cached Biology News:ESF EURYI award winner aims to stop cancer cells reading their own DNA 2Green tea boosts production of detox enzymes, rendering cancerous chemicals harmless 2Does the desire to consume alcohol and tobacco come from our genetic makeup? 2Does the desire to consume alcohol and tobacco come from our genetic makeup? 3
(Date:8/21/2014)... Ontotext S4 , The Self ... . Now the same enterprise hardened text mining, ... unstructured data is available to start-ups and mid-size businesses ... Organizations that do not have resources to evaluate and ... S4 since there is no need for on premise ...
(Date:8/21/2014)... August 21, 2014 SoundConnect ... been recognized as one of the nation’s Fastest ... magazine for the 2nd consecutive year. Inc. magazine ... annual Inc. 500|5000, an exclusive ranking of the ... most comprehensive look at the most important segment ...
(Date:8/20/2014)... RALEIGH, N.C. , Aug. 20, 2014 /PRNewswire/ ... clinical research services located in Raleigh, ... Bradford Evans as Vice President of ... Administration, Brad will oversee all corporate processes, including ... to joining Clintrax Global, Brad worked as an ...
(Date:8/20/2014)... often have it that American Indians largely were wiped ... influenza and tuberculosis brought to the New World by ... 20 million people lived in the Americas shortly before ... killed by European diseases., But new research led by ... Johannes Krause of the University of Tubingen in Germany ...
Breaking Biology Technology:Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 2Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 3Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 4SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 2SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 3Clintrax Global, Inc. Announces Addition to Executive Team 2Unusual discovery leads to fascinating tuberculosis theory 2Unusual discovery leads to fascinating tuberculosis theory 3
... SyntheMed, Inc. (OTC Bulletin Board: SYMD), a biomaterials company ... announced today that the company was recently nominated for ... pediatrics. The company is among three nominated ... analysts in recognition of the development of REPEL-CV(TM) Bioresorbable ...
... , ROCKVILLE, Md., June 23 MacroGenics, Inc. announced today ... company,s Board as an independent director. Mr. Costa is ... Corporation. With more than 35 years of experience in ... valuable expertise to the MacroGenics Board. , , "We ...
... the safety and integrity of the pharmaceutical supply chain ... Inc. announced today that it has received Verified Accredited ... Boards of Pharmacy (NABP) for its Woburn, Massachusetts facility. ... Beverly facility. The NABP developed VAWD in response to ...
Cached Biology Technology:SyntheMed Receives Frost & Sullivan Health Innovation Award Nomination 2Paulo F. Costa Joins MacroGenics Board of Directors 2Paulo F. Costa Joins MacroGenics Board of Directors 3CutisPharma, Inc. Receives Verified Accreditation for Wholesale Distributors from the National Association of Boards of Pharmacy for Woburn Facility 2
Mouse TREM-2 Affinity Purified Polyclonal Ab...
Human GATA-2 Affinity Purified Polyclonal Ab...
... R4 is the lowest priced, full ring ... world. Despite the microPET R4 low ... in all performance categories; count rate performance, ... microPET is a dedicated small animal PET ...
...
Biology Products: