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Topic: Corvids

In the News (Tue 14 Feb 12)

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	Ardastra gardens, zoo & conservation center \| Nassau, Bahamas
		Corvids are generally bold, noisy and gregarious (tending to form a group with others of the same kind), with evidence they originated from Australia.
		Corvids do not show any difference between the male and female (sexually monomorphic) and they tend to be “dressed” in colors of fl, brown, grey, white and blue.
		Most of the larger corvids have a strong, slightly curved bill shape with nasal bristles, whilst the smaller corvids often have a straight, pointed bill shape and no nasal bristles.
	www.ardastra.com /corvidinfo.html (990 words)

	Pigeonshooter homepage: Welcome to our home page
		When we think of corvid’s we think of the Crow, this is of course the Carrion Crow, often this birds name is used to cover 3 separate species of Corvid.
		The idea of owl decoys is that the Corvids come into mob them, i have found this to be not very effective to attract in Corvids, from what I have found you may bring in one or two but for real pest control they are not the best method.
		Often not so may are needed to bring in the corvids but they must be placed in a highly visible area or the corvids will ignore them, they also must be on a patch of land with something which a corvid would want to eat.
	www.freewebs.com /pigeonshooterhomepage/corvids.htm (1121 words)

	Testing Tables & Maps (Site not responding. Last check: 2007-10-26)
		A corvid is a bird that is a member of the Corvidae family (or crow family), which includes crows, blue jays and ravens.
		Corvids appear to be especially susceptible to West Nile virus infection and can be used as an early indicator of the virus in an area.
		Corvid numbers per week are based on the date the bird was observed sick or dead.
	mi.gov /emergingdiseases/0,1607,7-186-25805_26531---,00.html (528 words)

	Postcard profile: Corvids (www.wcsv.org) (Site not responding. Last check: 2007-10-26)
		Corvids are a group of birds consisting of crows, ravens, jays, magpies, rooks, nutcrackers and jackdaws.
		Because of this, the female of many corvid species remains with the young and depends on her mate for food while the nestlings are with her.
		Corvids are considered to be the most intelligent of all birds, and have the largest brain relative to their body size.
	www.wcsv.org /education/profiles/corvid.htm (272 words)

	EVOLUTION: ON THE MENTALITY OF CROWS (Site not responding. Last check: 2007-10-26)
		Corvids also appear to meet many of the criteria for the use of social knowledge in their interactions with conspecifics.
		The relative size of the forebrain in corvids is significantly larger than in other birds (with the exception of some parrots) [2], particularly those areas thought to be analogous to the mammalian prefrontal cortex: the nidopallium and mesopallium.
		Although the ape neocortex and corvid nidopallium are both significantly enlarged, their structures are very different, with the ape neocortex having a laminar arrangement and the avian pallium having a nuclear arrangement [2].
	scienceweek.com /2005/sa050128-2.htm (1860 words)

	The Corvids (Crows, Magpies, Ravens etc.)
		The brilliant blues and greens found in these birds, as well as the iridescence in amongst the fls of many corvids are structural colours caused by refraction of the light by minute physical aspects of the feathers.
		Corvids have 11 primaries but one is only 1cm long and not easily visible, it is called a 'remicle'.
		Corvids are believed to have reached the Americas via the Bering Land Bridge.
	www.earthlife.net /birds/corvidae.html (2568 words)

	CDC - Rapid Antigen-Capture Assay To Detect West Nile Virus in Dead Corvids
		The utility of the VecTest antigen-capture assay to detect West Nile virus (WNV) in field-collected dead corvids was evaluated in Manitoba and Ontario, Canada, in 2001 and 2002.
		Sensitivity and specificity of the antigen-capture assay applied to oropharyngeal and cloacal swabs from corvids were calculated by using the results of TaqMan RT-PCR assays on swab or tissue samples as the “true” outcome (6).
		In contrast, with the exception of 42 birds in which tissue samples were used to establish WNV infection status, the Manitoba results evaluate the sensitivity and specificity of the antigen-capture assay by using swab eluates in relation to the detection of virus in the same sample by TaqMan RT-PCR.
	www.cdc.gov /ncidod/EID/vol9no11/03-0318.htm (2923 words)

	Ravens
		Pesky, oft-reviled ravens and other corvids are turning out to be one of the animal kingdom's cleverest of creatures.
		These talents of mimicry reflect the general braininess of corvids -- which is so high that, by most standards of animal assessment, it's off the scale.
		In this, the PR profile of corvids may parallel that of their allies, the wolves.
	www.winlawwoodlot.ca /raven/corvids.htm (1647 words)

	CD Baby: KEN LAYNE AND THE CORVIDS: Fought Down
		Ken Layne and the Corvids' debut - "Fought Down" (Scrub Jay, 3 stars) - is alt-country with a strong straight rock influence, resembling Son Volt without the mannered touches or the more laid-back moments of Drive-By Truckers.
		Layne's singing voice is in that rough hewn alt-style, not a perfect-pitch experience but not deliberately loose, and emotional enough to compete with the ringing guitars.
		Granted, the Corvids have a rhythm section to die for, borrowed from Hollywood's hottest rock band, Tsar (speaking of great albums...in an entirely different genre).
	cdbaby.com /cd/kenlayne (1712 words)

	The Revered, Reviled Crow Clan - National Zoo\| FONZ
		Corvids use their guile and versatile, strong bills to procure an amazing assortment of foodstuffs.
		Many corvids, once the young are out of the nest, travel around in small or large, frequently noisy, post-breeding flocks.
		Other corvids lead precarious lives due to habitat destruction in their limited ranges, including the Ceylon magpie (Urocissa ornata), Mexico's dwarf jay (Cyanolyca nana), the Sichuan jay (Perisoreus internigrans), and the white-necked crow (Corvus leucognaphalus) of Haiti and the Dominican Republic.
	nationalzoo.si.edu /Publications/ZooGoer/2001/3/reviledcrowclan.cfm (3010 words)

	Urban Bird Studies
		Corvids build well-hidden nests in trees or shrubs, often near buildings or sidewalks.
		Corvids are usually obvious in color or size.
		Although many corvid behaviors are well-studied, little is understood about how these birds live and interact in groups.
	birds.cornell.edu /programs/private/urbanbirds/About/ubs_CRCWhyEN.html (234 words)

	Interactions between Corvids and a Golden Eagle on a Pheasant Kill
		Immediately the corvids converged on it, only to hop away as the eagle returned to it.
		Although the feathers had blown over a wide expanse, there were corvid tracks around all of them.
		The eagle seemed to benefit by using the reactions of the corvids as a warning of possible danger.
	elibrary.unm.edu /sora/Auk/v091n01/p0180-p0181.html (975 words)

	Log Cabin Chronicles Beth Girdler's Crows Column
		Corvids have a fascinating habit of congregating in large numbers in the non-breeding seasons to sleep together.
		When corvids find a mate, after a long selection and courtship process, they are often tolerated within their parents' territory where they nest and raise their own young.
		With a brain proportionate in size to that of humans or dolphins, corvids are considered among the most intelligent animals on earth.
	www.tomifobia.com /crows.html (897 words)

	Pharyngula::Clever birds
		I learned that the brain/body ratio of the crow is approximately the same as that of a chimpanzee, and that in particular, the crow has a disproportionately large nidopallium and mesopallium, which are the regions that correspond roughly to our primate prefrontal cortex.
		Corvids observe other birds caching food, and can retrace their way to caches for pilfering days later.
		When confronted with meat suspended from a string attached to a perch, ravens can solve the problem on the first trial: they pull the string up with their beak, step on it to hold it in place, pull up another stretch, etc., until the meat can be reached.
	pharyngula.org /index/weblog/comments/clever_birds (1853 words)

	Untitled Document (Site not responding. Last check: 2007-10-26)
		I initially became interested in the abilities of ravens and crows to upset ecosystem processes by noting that their increases were directly associated with decreases in pinyon jay nest productivity and flock size in Northern Arizona.
		I subsequently documented the general increase in corvids throughout the western US and am working on an experimental assessment of their predatory abilities in various forest structures and surrounding landscapes in Washington.
		Here we survey corvids, monitor predation by corvids and mammals at simulated murrelet nests, and follow radio-tagged corvids to determine their use of the landscape.
	www.cfr.washington.edu /people/Faculty/Marzluff/research.htm (1100 words)

	AirGunForum -> F***ing Corvids!!
		I decided to set up a hide made from scrim in the corner of the field where the flightpaths crossed and put out a slit open rabbit and some liver along with a couple o' decoys.
		Thirdly, the corvids on my shoot are used to being shot at by shotguns (not mine), which makes them suspicious of any unnatural development on their patch.
		Corvids are the hardest quarry for an airgunner, and not without good reason.
	www.airgunforum.net /agf/index.php?act=ST&f=7&t=9806&s=147ed992553b0fee66f83d3fbb8b6441 (687 words)

	Bird Intelligence
		It was found that the larger this part of the brain was the better birds did on tests to measure intelligence.
		Not surprisingly Corvids have are the group of birds where this is the largest.
		Corvids such as Crows, Ravens and Magpies may separate into a family group for things like nesting and territory defense, and then congregate into huge flocks.
	www.all-birds.com /brain.htm (1008 words)

	The Language of Corvids (Site not responding. Last check: 2007-10-26)
		Corvid song often includes imitated sounds, it is primarily composed of the bids “natural calls” Theses, of course, vary from species to species – Crows Caw, ravens croak, jays scream, magpies chatter.
		Like the whimpers, sighs, giggles of human being, these utterances are not learned but come part of the organisms’ species-specific genetic package, in which each call has a preassigned function.
		Ravens- which probably produce a greater variety of sounds than any other animal except ourselves- are variously estimated to have between eighteen and sixty-four recognizable different kaa’s, kruk’s, krr’s, nuk’s, clucks, rattles and trills, which presumably permits them to express a variety of meanings.
	www.naturesound.org /Language%20of%20Corvids.htm (568 words)

	CDC - Rapid Antigen-Capture Assay To Detect West Nile Virus in Dead Corvids
		The ultimate goal of this study was to determine whether the VecTest assay could serve as a suitable alternative testing procedure for WNV dead bird surveillance.
		This goal was achieved by quantifying the sensitivity and specificity of this antigen-capture assay to detect WNV in corvids collected as part of routine dead bird surveillance programs in Manitoba and Ontario.
		Corvids collected as part of the WNV dead bird surveillance programs in Manitoba and Ontario, Canada, in 2001 and 2002 were used.
	www.cdc.gov /Ncidod/EID/vol9no11/03-0318.htm (2923 words)

	appliedeco.htm
		My research is among the first to quantify the impact of corvids as dominant nest predators.
		My evidence indicates that corvids have a nest-oriented search pattern, in contrast to the random searches made by rodent nest predators.
		My research demonstrates that understanding the behavior and ecology of nest predators is key to understanding the structure and conservation of bird communities.
	www.willamette.edu /~dpcraig/rsrchcorvids.htm (283 words)

	VetMD
		Corvids: crows, ravens, jays, and jackdaws, are some pretty smart birds.
		Corvids are also able to cash their food, and remember the expiration dates on up to 30,000 different items.
		The paper goes on to describe how intelligence in Corvids is an example of convergent evolution, and perhaps intelligence is not as rare as we first thought.
	vetmd.blogspot.com (1556 words)

	SFBBO - Research & Monitoring - Corvids (Site not responding. Last check: 2007-10-26)
		The data clearly backs up the "gut feel" that in the bay area the smaller suburban corvids are little changed, but the larger corvids have recently moved in and are thriving.
		The only count that bucks this trend is for crows in San Jose, wherein abundances fell off in the '70s and '80s, and have now recovered to earlier count levels.
		Because of their reputations as aggressive predators on nests and young, the rapid corvid population expansions raise concern for threatened and endangered species in the bay.
	www.sfbbo.org /corvidcbc.html (973 words)

	CD Baby: KEN LAYNE AND THE CORVIDS: Fought Down
		Ken Layne and the Corvids' debut - "Fought Down" (Scrub Jay, 3 stars) - is alt-country with a strong straight rock influence, resembling Son Volt without the mannered touches or the more laid-back moments of Drive-By Truckers.
		Layne's singing voice is in that rough hewn alt-style, not a perfect-pitch experience but not deliberately loose, and emotional enough to compete with the ringing guitars.
		Granted, the Corvids have a rhythm section to die for, borrowed from Hollywood's hottest rock band, Tsar (speaking of great albums...in an entirely different genre).
	www.cdbaby.com /cd/kenlayne (1734 words)

	BirdForum - Corvids and Golf Balls
		It seems wierd to me that the bird grabbing the sqiurrels tail to force the drop is doing it seemingly knowing that its either going to loose the food or have to scuffle for it.
		I think that Corvids on the whole are more social than given credit for and even if it is at the expense of another bird, they do it just for the hell of it, just for being with their peers as it were.
		Corvids are probably like us humans and would probably prefer one of their own species get the prize than have an 'inferior species' have it.
	www.birdforum.net /printthread.php?t=5586 (717 words)

	VecTest for Detecting West Nile Virus \| CDC EID
		After high WNV titers were demonstrated in the oral and cloacal cavities of corvids (7), the VecTest was evaluated relative to RT-PCR in saliva, feces, and tissue samples from a small sample of American Crows (Corvus brachyrhynchos) in Illinois (8), and oral and cloacal swabs from corvids in a larger study in Canada (9).
		Sensitivity in corvids (21%, 3/14) was similar to that in raptors (18%, 5/28).
		In experimentally exposed corvids, WNV has been shown to be present at roughly similar concentrations in a wide variety of tissues at death (13).
	www.cdc.gov /ncidod/EID/vol10no12/04-0836.htm (4332 words)

	Corvid family
		The Corvids are a large family composed of the familiar crows and jays, plus close relatives like magpies, treepies, nutcrackers and choughs.
		Most corvids are sedentary without significant migrations, but occasionally a collapse of food supplies will send "invasions" of montane corvids into the lowlands.
		The close relationship of these groups to the corvids is, however, one of the major findings of Sibley and colleagues, and has served to reorganize the taxonomic arrangement of the world's families.
	www.montereybay.com /creagrus/corvids.html (2213 words)

	Ken Layne & the Corvids: they're back!
		We recognize the familar country/far-west themes, but with the American Civil War, the settlement of the West and Gold Rush in the background, and of course, the bad news birds from the first record (the photo at the time captures the spirit of the oeuvre.)
		Rien à voir avec les corvids mais j'avais lu l'histoire du type qui a tué cette petite fille pour la manger: Sordid of course.
		Posted by: claude at April 20, 2006 11:32 PM Interesting blog, but don't forget "A Tourist in Paris" http://www.francefoto.com which is pure self promotion but you may find the images interesting.
	www.emmanuelle.net /2006/04/ken_layne_the_corvids_theyre_b.html (246 words)

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