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26 results for “Bird calls”
An endangered bird calls less when invasive birds are calling
<p>Novel noises can affect various animal behaviours, and changes to vocal behaviour are some of the most documented. The calls of invasive species are an important source of novel noise, yet their effects on native species are poorly understood. We examined the effects of invasive bird calls on the vocal activity of an endangered Australian finch to investigate whether: (i) native finch calling behaviour was affected by novel invasive bird calls, and (ii) the calls of the finches overlapped in frequency with those of invasive birds. We exposed a wild population of Black-throated Finch southern subspecies (<i>Poephila cincta cincta</i>) to the vocalisations of two invasive birds, Nutmeg Mannikins (<i>Lonchura punctulata</i>) and Common Mynas (<i>Acridotheres tristis</i>), a synthetic 'pink' noise, and a silent control. To determine whether the amount of Black-throated Finch calling differed in response to treatments, we recorded and quantified Black-throated Finch vocalisations, and assessed the amount of calling using a generalised linear mixed model followed by pairwise comparisons. We also measured, for both Black-throated Finches and the stimulus noises: dominant, minimum and maximum frequency, and assessed the degree of frequency overlap between Black-throated Finch calls and stimulus noises. Compared to silent controls, Black-throated Finches called less when exposed to Common Myna calls and pink noise, but not to Nutmeg Mannikin calls. We also found that pink noise overlapped most in frequency with Black-throated Finch calls. Common Myna calls also somewhat overlapped the frequency range of Black-throated Finch calls, whereas Nutmeg Mannikin calls overlapped the least. It is possible that masking interference is the mechanism behind the reduction in calling in response to Common Myna calls and pink noise, but more work is needed to resolve this. Regardless, these results indicate that the calls of invasive species can affect the behaviour of native species, and future research should aim to understand the scope and severity of this issue.</p>
Data from: Alarm calls of a cooperative bird are referential and elicit context-specific antipredator behavior
Although functionally referential signals have been extensively studied, largely in mammals (e.g., nonhuman primates, see Cheney and Seyfarth (1988); mongooses, see Manser et al. (2002); and other ground-dwelling species, see Blumstein and Armitage (1997), other social taxa such as birds would similarly benefit from the use of referential signals. We therefore investigated alarm calling in the cooperative noisy miner (Manorina melanocephala), a species that has been anecdotally recorded producing aerial alarms to flying predators and empirically recorded generating terrestrial alarms to ground-based threats. For these signals to be truly referential however, they must meet 3 criteria. First, calls must be structurally distinct, a requirement that these 2 call types meet. Second, calls must be stimulus-specific and reliably associated with a given stimulus. We tested this on free-living birds by exposing them to a simulated aerial predator that was either in flight or subsequently perched and thus presented one of the first studies on functionally referential alarm systems where both aerial and terrestrial alarm calls have been tested. Miners only produced aerial alarms while the stimulus was in flight, switching to terrestrial alarms once it landed. Third, referential signals must elicit different escape responses that are "appropriate" to the associated threat. Under field conditions, aerial alarm playback alone provoked an almost instantaneous response of fleeing to vegetation cover, whereas terrestrial alarm playback elicited significantly slower responses by receivers and an increase in scanning behavior. During laboratory experiments, aerial alarms stimulated birds to spend more time looking upwards, whereas terrestrial alarm calls stimulated individuals to scan perpendicularly, as expected if these stimuli provided information on likely predator location. Although other avian taxa have been shown to use referential alarm signals, this system provides novel evidence of referential calls based on the behavior rather than the type of predator, providing a highly adaptive means of communicating risk to other members of the social group in this cooperative species.
Data from: Alarm calls of a cooperative bird are referential and elicit context-specific antipredator behavior
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An endangered bird calls less when invasive birds are calling
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Data from: Nocturnal flight-calling behaviour predicts vulnerability to artificial light in migratory birds
Understanding interactions between biota and the built environment is increasingly important as human modification of the landscape expands in extent and intensity. For migratory birds, collisions with lighted structures are a major cause of mortality, but the mechanisms behind these collisions are poorly understood. Using 40 years of collision records of passerine birds, we investigated the importance of species' behavioral ecologies in predicting rates of building collisions during nocturnal migration through Chicago, IL and Cleveland, OH, USA. We found that use of nocturnal flight calls is an important predictor of collision risk in nocturnally migrating passerine birds. Species that produce flight calls during nocturnal migration collided with buildings more than expected given their local abundance, whereas those that do not use such communication collided much less frequently. Our results suggest that a stronger attraction response to artificial light at night in species that produce flight calls may mediate these differences in collision rates. Nocturnal flight calls likely evolved to facilitate collective decision-making during navigation, but this same social behavior may now exacerbate vulnerability to a widespread anthropogenic disturbance. Our results also suggest that social behavior during migration may reflect poorly-understood differences in navigational mechanisms across lineages of birds.
Data from: Nocturnal flight-calling behaviour predicts vulnerability to artificial light in migratory birds
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.