| 释义 |
Definition of cowbird in English: cowbirdnounˈkaʊbəːdˈkaʊbərd A New World songbird with dark plumage and a relatively short bill, typically laying its eggs in other birds' nests. Genus Molothrus (and Scaphidura), family Icteridae: several species, in particular the widespread brown-headed (or common) cowbird (M. ater) Example sentencesExamples - We observed live female cowbirds at sparrow nests on 12 occasions; 11 of these were laying bouts.
- Cowbird visits usually occurred after the host left the nest, suggesting that cowbirds monitored nests closely.
- Open land provides habitat for cowbirds and nest predators.
- Incubation time is short, 10 to 12 days, which allows the young cowbird to get a head start in the nest.
- Instead of our winter visitors that left us for more northern areas, we now have grackles, red-wings and cowbirds.
- Studies have revealed that as many as 90 percent of the vireo nests in Texas and Oklahoma have been invaded by cowbirds.
- Since 1972, decoy traps baited with seeds and live cowbirds have been set out across the warbler's breeding grounds.
- In British Columbia, nearly 25% of Veery nests found had been parasitized by cowbirds.
- The only characteristic that separated parasitic cowbirds from their nonparasitic relatives was an increase in eggshell thickness.
- While female cowbirds don't sing, male cowbirds belt out a small repertory of songs, each one less than a second long.
- Warbling Vireo nests that are parasitized by cowbirds typically produce no vireo young.
- The probability of parasitism may vary among hosts because differences in their behaviors assist cowbirds in locating nests.
- Cuckoos and cowbirds lay eggs in nests of different species to avoid the costs of brood care.
- Blackbirds, cowbirds, and mockingbirds are common companions throughout most of the year.
- This fracturing allows birds of the forest edge, such as cowbirds and blue jays, to parasitize and prey upon the thrushes.
- Chaffinches and cowbirds are not the only birds that teach song to their young.
- Estimating the cost of accepting a cowbird egg was done by experimentally placing newly hatched cowbird chicks into catbird nests.
- Rothstein said that since most songbirds only sing, he suspects the cowbirds learned to sing before they started to dance.
- In Missouri, sparrows and cowbirds arrived at nests at 13.5 and 14.7 min before sunrise, respectively.
- Our findings suggest that cowbirds are relatively long lived and that recruitment into the breeding population is low.
Definition of cowbird in US English: cowbirdnounˈkaʊbərdˈkoubərd A New World songbird with dark plumage and a relatively short bill, typically laying its eggs in other birds' nests. Genus Molothrus (and Scaphidura), family Icteridae: several species, in particular the widespreadbrown-headed (or common) cowbird (M. ater) Example sentencesExamples - Open land provides habitat for cowbirds and nest predators.
- We observed live female cowbirds at sparrow nests on 12 occasions; 11 of these were laying bouts.
- The probability of parasitism may vary among hosts because differences in their behaviors assist cowbirds in locating nests.
- Instead of our winter visitors that left us for more northern areas, we now have grackles, red-wings and cowbirds.
- Cuckoos and cowbirds lay eggs in nests of different species to avoid the costs of brood care.
- In British Columbia, nearly 25% of Veery nests found had been parasitized by cowbirds.
- While female cowbirds don't sing, male cowbirds belt out a small repertory of songs, each one less than a second long.
- Blackbirds, cowbirds, and mockingbirds are common companions throughout most of the year.
- Rothstein said that since most songbirds only sing, he suspects the cowbirds learned to sing before they started to dance.
- This fracturing allows birds of the forest edge, such as cowbirds and blue jays, to parasitize and prey upon the thrushes.
- The only characteristic that separated parasitic cowbirds from their nonparasitic relatives was an increase in eggshell thickness.
- Estimating the cost of accepting a cowbird egg was done by experimentally placing newly hatched cowbird chicks into catbird nests.
- Warbling Vireo nests that are parasitized by cowbirds typically produce no vireo young.
- Cowbird visits usually occurred after the host left the nest, suggesting that cowbirds monitored nests closely.
- Our findings suggest that cowbirds are relatively long lived and that recruitment into the breeding population is low.
- In Missouri, sparrows and cowbirds arrived at nests at 13.5 and 14.7 min before sunrise, respectively.
- Incubation time is short, 10 to 12 days, which allows the young cowbird to get a head start in the nest.
- Since 1972, decoy traps baited with seeds and live cowbirds have been set out across the warbler's breeding grounds.
- Chaffinches and cowbirds are not the only birds that teach song to their young.
- 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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