How To Use Cowbird In A Sentence
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‘On the 18th, we were ‘invaded’ by a flock of over 100 mixed redwings, grackles, starlings, and cowbirds that ate everything in sight and emptied the bird bath in minutes!’
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With the clearing of forests and the spread of farming, the cowbird's range expanded north and east.
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Future research should focus on such traits of cowbird relatives and on how these traits preadapted a particular lineage to become parasites.
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Bronzed Cowbirds perform spectacular three-part courtship displays incorporating both of their major categories of song.
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Cowbirds inhabit most parts of North America, and they have been reported to parasitize many different species in almost any type of habitat.
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Fitness costs vary greatly among host species in part because cowbirds parasitize host species at widely divergent frequencies, even among hosts breeding in the same habitat.
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Rothstein said that since most songbirds only sing, he suspects the cowbirds learned to sing before they started to dance.
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Warbling Vireo nests that are parasitized by cowbirds typically produce no vireo young.
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To address that, we experimentally parasitized longspur nests with real and wooden cowbird eggs to determine whether longspurs eject cowbird eggs.
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Parasitic cuckoos, cowbirds and weavers lay many more eggs per season than their non-parasitic relatives.
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Female cowbirds were held in captivity and released at the end of the breeding season.
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While song sparrows and yellow warblers, two of the most common cowbird eggs' hosts, are not deep woods birds, these small songbirds are unable to compete with the wildly proliferating numbers of cowbirds.
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Our findings suggest that cowbirds are relatively long lived and that recruitment into the breeding population is low.
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Blackbirds, cowbirds, and mockingbirds are common companions throughout most of the year.
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Estimating the cost of accepting a cowbird egg was done by experimentally placing newly hatched cowbird chicks into catbird nests.
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Other authors have stated that incubation in cowbirds only differs from other passerines in the minimum reported.
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When this egg-laying trick is well played, the cowbird egg hatches before the other eggs in the nest.
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Sure, some birds have names that describe their activities, such as flycatcher, or gnatcatcher, or their general appearance, such as bluebird, or the place they tend to loiter, such as cowbird.
Birding season: No grousing or sniping
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The probability of parasitism may vary among hosts because differences in their behaviors assist cowbirds in locating nests.
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She saw many colorful birds that she knew only from the books she studied: a cardinal and its mate, a cowbird, a catbird, two blue jays, and what she thought was a titmouse.
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Chaffinches and cowbirds are not the only birds that teach song to their young.
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Model eggs were made of plaster-of-Paris from casts of real cowbird eggs and painted with acrylic paints and polyurethane to mimic real cowbird eggs.
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Furthermore, human commensal species, such as great-tailed grackle Quiscalus mexiccanus and bronzed cowbird Molothrus aeneus, normally increase in number around human settlements and result in the loss of nesting success in other birds.
Belize Barrier Reef Reserve System, Belize
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Uh, cowbirds used to be very scarce in North America and with our habitat fragmentation their populations have just boomed and the only place that small songbirds like warblers can lay their eggs to get away from these parasitic cowbirds is deep in the forest.
A Promise
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The wood and hermit thrushes and their cousin the veery have taken a severe hit from the cowbirds, so that they are on the brink of becoming endangered species.
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Studies have shown that predation and cowbird parasitism decreases as nests are located farther away from edges and towards forest interiors.
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Last weekend I shot 18+ cowbirds, a crow, and 5+ pigions.
I have a one shot 20gauge shotgun and i just cant seem to hit them.I try to shoot doves but just keep missing and missing.
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Unlike certain avian brood parasites, such as cuckoos and honeyguides, hatchling brown-headed cowbirds rarely directly destroy or actively displace host eggs and nestlings.
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Two species in whose nests these cuckoos' eggs have been found, and which are known to eject cowbird eggs, did not significantly eject more nonmimetic than mimetic cuckoo eggs.
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One nest was parasitized after incubation had begun, and the cowbird egg in another nest did not hatch.
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The cowbird parents tricked the vireo into raising their young.
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They'd wanted a big, selfish cowbird chick of their own---an even closer, more important blood relative---that would squeeze Keefer out.
A THEORY OF RELATIVITY
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Objects were painted to either simulate the color and maculation of Brownheaded Cowbirds eggs (i.e., off-white background with brown speckles [see Harrison 1978) or they were painted immaculate white.
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One host egg was missing following an ejection of an artificial cowbird egg.
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When I took a human-animal interaction class in college, we were taught that cats are not properly considered domesticated but commensal, like a remora or a cowbird but with much more sophisticated social engineering!
Hard wired to the past | The Blog of Michael R. Eades, M.D.
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It may also be that parental phoebes attempted to dislodge cowbird shells and some were able to do so.
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Incubation time is short, 10 to 12 days, which allows the young cowbird to get a head start in the nest.
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However, egg coloration has gone through considerable evolution in different species of cowbirds.
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Yet, the presence of cowbird chicks is often accompanied by a reduction of the number of host chicks and fledglings.
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Instead of our winter visitors that left us for more northern areas, we now have grackles, red-wings and cowbirds.
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Cowbird nestlings were placed into nests prior to the hatching of host nestlings to simulate the shorter incubation periods characteristic of parasitic species.
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Obviously comfortable with the relationship, capybaras (the largest living rodents) are unfazed when cowbirds alight on their heads and begin to peck around their eyes and ears.
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UF study first to document evidence of 'mafia' behavior in cowbirds
Science Press Releases
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The birds — a mixed flock of red-winged blackbirds, brown-headed cowbirds, grackles and starlings — may have hit a power line or vehicles in the dark, LaCour said.
Louisiana has mass bird deaths just days after Arkansas
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Chaffinches and cowbirds are not the only birds that teach song to their young.
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Since 1972, decoy traps baited with seeds and live cowbirds have been set out across the warbler's breeding grounds.
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They are known to attack Brown-headed Cowbirds, and the low rate of cowbird parasitization of their nests seems to indicate that their defense is effective.
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Since 1972, decoy traps baited with seeds and live cowbirds have been set out across the warbler's breeding grounds.
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I noted the number of phoebe and cowbird eggs and nestlings at each visit.
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In Missouri, sparrows and cowbirds arrived at nests at 13.5 and 14.7 min before sunrise, respectively.
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In the agricultural Midwest, more than 80 percent of the nests of some species - veery, wood thrush, hooded warbler, red-eyed vireo, scarlet tanager, and others - host cowbird eggs.
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Furthermore, human commensal species, such as great-tailed grackle Quiscalus mexiccanus and bronzed cowbird Molothrus aeneus, normally increase in number around human settlements and result in the loss of nesting success in other birds.
Belize Barrier Reef Reserve System, Belize
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This fracturing allows birds of the forest edge, such as cowbirds and blue jays, to parasitize and prey upon the thrushes.
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Cuckoos and cowbirds lay eggs in nests of different species to avoid the costs of brood care.
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Cowbird visits usually occurred after the host left the nest, suggesting that cowbirds monitored nests closely.
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We extended the analysis to the five cowbird species that conform a monophyletic group in the phylogeny.
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Cowbird removals are used in management of several endangered species of songbird.
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Song matching appears to be a feature of antiphonal singing of Brown-headed Cowbird flight whistles.
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In British Columbia, nearly 25% of Veery nests found had been parasitized by cowbirds.
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Open land provides habitat for cowbirds and nest predators.
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Field Sparrows are not known to eject cowbird eggs.
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Our findings suggest that cowbirds are relatively long lived and that recruitment into the breeding population is low.
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Nevertheless, the ejection of nonmimetic eggs by longspurs suggests they are physically capable of removing cowbird eggs, yet they accepted all cowbird eggs added to their nests.
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I was sure the cowbird, a female, was targeting the phoebes, and apparently they knew it too.
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These warblers have no known defence against cowbird parasitism.
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Instead of our winter visitors that left us for more northern areas, we now have grackles, red-wings and cowbirds.
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Studies have revealed that as many as 90 percent of the vireo nests in Texas and Oklahoma have been invaded by cowbirds.
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Fleischer used gel electrophoresis to discriminate yolk allozymes sampled from eggs laid by several female cowbirds.
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Trappers kill the cowbirds by asphyxiating them with automobile exhaust or by breaking their necks.
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In addition, Emberizids are hosts for brown-headed cowbirds, a parasitic species of bird that lays its eggs in the nests of other bird species.
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Jim LaCour said that the grackles, starlings, brown-headed cowbirds and red-winged blackbirds had broken beaks and backs.
Apocalypse now? Mystery bird deaths hit Louisiana
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Thus, foraging habitat was readily accessible to cowbirds on all study sites.
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The only characteristic that separated parasitic cowbirds from their nonparasitic relatives was an increase in eggshell thickness.
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The findings are particularly striking because so many birds seem to be unable to recognize the chicks of species such as cowbirds and cuckoos, which always lay their eggs in the nests of other birds.
PhysOrg.com - latest science and technology news stories
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They'd wanted a big, selfish cowbird chick of their own---an even closer, more important blood relative---that would squeeze Keefer out.
A THEORY OF RELATIVITY
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As many of you already know, cowbirds parasitize other, smaller birds by laying their eggs in other birds' nests, often those of thrushes, sparrows or warblers.
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The Bronzed Cowbird is an obligate brood parasitic species of songbird, ranging from the southern border region of the United States as far south as Central America.
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We observed live female cowbirds at sparrow nests on 12 occasions; 11 of these were laying bouts.
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While female cowbirds don't sing, male cowbirds belt out a small repertory of songs, each one less than a second long.
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However, cowbirds exhibit density-dependent selection of wooded edge versus prairie interior habitats in the region.
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The cowbirds were the first to leave the sylvan roof tree.
Our Bird Comrades
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Sure, some birds have names that describe their activities, such as flycatcher, or gnatcatcher, or their general appearance, such as bluebird, or the place they tend to loiter, such as cowbird.
Birding season: No grousing or sniping
-
When I took a human-animal interaction class in college, we were taught that cats are not properly considered domesticated but commensal, like a remora or a cowbird but with much more sophisticated social engineering!
Hard wired to the past | The Blog of Michael R. Eades, M.D.
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In the agricultural Midwest, more than 80 percent of the nests of some species - veery, wood thrush, hooded warbler, red-eyed vireo, scarlet tanager, and others - host cowbird eggs.
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These researchers studied brown-headed cowbirds, a species that lays eggs in the nests of other species, in their case indigo buntings.
