IDENTIFICATION : ‘Green’ finches
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چکیده
Greenfinches can be found throughout the year within gardens, with numbers increasing during the winter months. Depending upon where you live, you may find that Siskins are either year-round visitors or just appear for a period during late winter. The chances are that you will get the opportunity to view these two species alongside one another, providing the ideal conditions to really work out how to separate the two in their various plumages.
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The stability of the circadian rhythm of green finches (Carduelis chloris) under the influence of a weak electrical field.
Free-running activity rhythms of nine green finches (Carduelis chloris) were studied under the influence of a 10-Hz square-wave electrical field. With a field strength of magnitude of E = 2.5 V/m in the empty cage, the population had a mean period of 23.64 +/- 0.77 hr. In the same experiment, but without the electrical field, the period was 23.66 +/- 0.80 hr. These results are in contradiction ...
متن کاملUltraviolet vision and band-colour preferences in female zebra finches, Taeniopygia guttata
Zebra finches have previously been found to have preferences for particular colours of both natural and artificial traits among opposite sex conspecifics. For example, in some studies female zebra finches preferred males wearing red leg bands to orange-banded and unbanded birds and rejected light green-banded males. In other studies, females also preferred males with red beaks to orange-beaked ...
متن کاملEffect of dose on house finch infection with western equine encephalomyelitis and St. Louis encephalitis viruses.
House finches, Carpodacus mexicanus, were experimentally infected with high and standard doses of western equine encephalomyelitis virus (WEEV) or St. Louis encephalitis virus (SLEV) to determine whether high doses would produce an elevated viremia response and a high frequency of chronic infections. Finches inoculated with approximately100,000 plaque forming units (PFU) of WEEV or SLEV produce...
متن کاملColour Cues That Are Not Directly Attached to the Body of Males Do Not Influence the Mate Choice of Zebra Finches
Mate choice decisions of female zebra finches are generally thought to rely on the assessment of male quality, which includes the specific ornamentation of males. A commonly used paradigm to experimentally manipulate a male's attractiveness is to add a coloured leg ring to the bird. Some studies have shown that female zebra finches prefer or alter their investment in males that have an addition...
متن کاملSpecies differences in the identification of acoustic stimuli by birds.
The perceptual organization of auditory stimuli can reveal a great deal about how the brain naturally groups events. The current study uses identification techniques to investigate the abilities of two species of birds in identifying zebra finch song as well as synthetically generated speech stimuli. Budgerigars (Melopsittacus undulatus) and zebra finches (Taeniopygia guttata) were trained to d...
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