| the sensitivities of various erythrocytes in a haemagglutination assay for the detection of psittacine beak and feather disease virus. | the erythrocytes of various species were tested in psittacine beak and feather disease (pbfd) virus haemagglutination (ha) and haemagglutination inhibition assays to determine which are suitable for use in these assays. ha activity was observed for erythrocytes of the salmon-crested cockatoo, the sulphur-crested cockatoo, the umbrella cockatoo, the goffin's cockatoo and the cockatiel, with differences amongst individuals within species, but not for erythrocytes of humans, the pig, the guinea pig ... | 2000 | 11014065 |
| inference by exclusion in goffin cockatoos (cacatua goffini). | inference by exclusion, the ability to base choices on the systematic exclusion of alternatives, has been studied in many nonhuman species over the past decade. however, the majority of methodologies employed so far are hard to integrate into a comparative framework as they rarely use controls for the effect of neophilia. here, we present an improved approach that takes neophilia into account, using an abstract two-choice task on a touch screen, which is equally feasible for a large variety of s ... | 2015 | 26244692 |
| goffin's cockatoos make the same tool type from different materials. | innovative tool manufacture is rare and hard to isolate in animals. we show that an indonesian generalist parrot, the goffin's cockatoo, can flexibly and spontaneously transfer the manufacture of stick-type tools across three different materials. each material required different manipulation patterns, including substrates that required active sculpting for achieving a functional, elongated shape. | 2016 | 27852942 |
| within-group relationships and lack of social enhancement during object manipulation in captive goffin's cockatoos (cacatua goffiniana). | different types of social relationships can influence individual learning strategies in structured groups of animals. studies on a number of avian species have suggested that local and/or stimulus enhancement are important ingredients of the respective species' exploration modes. our aim was to identify the role of enhancement during object manipulation in different social contexts. we used focal observations to identify a linear dominance hierarchy as well as affiliative relationships between i ... | 2017 | 27406172 |
| flexible decision-making relative to reward quality and tool functionality in goffin cockatoos (cacatua goffiniana). | decisions involving the use of tools may require an agent to consider more levels of relational complexity than merely deciding between an immediate and a delayed option. using a new experimental approach featuring two different types of tools, two apparatuses as well as two different types of reward, we investigated the goffin cockatoos' ability to make flexible and profitable decisions within five different setups. paralleling previous results in primates, most birds overcame immediate drives ... | 2016 | 27334699 |
| waiting for better, not for more: corvids respond to quality in two delay maintenance tasks. | self-control, that is, overcoming impulsivity towards immediate gratification in favour of a greater but delayed reward, is seen as a valuable skill when making future-oriented decisions. experimental studies in nonhuman primates revealed that individuals of some species are willing to tolerate delays of up to several minutes in order to gain food of a higher quantity or quality. recently, birds (carrion crows, corvus corone, common ravens, corvus corax, goffin cockatoos, cacatua goffiniana) per ... | 2014 | 25892738 |
| spontaneous innovation in tool manufacture and use in a goffin's cockatoo. | | 2012 | 23137681 |
| animal behavior case of the month. a goffin's cockatoo was examined because it had been avoiding the female owner for the past 3 months. | | 2001 | 11229501 |
| combinatory actions during object play in psittaciformes (diopsittaca nobilis, pionites melanocephala, cacatua goffini) and corvids (corvus corax, c. monedula, c. moneduloides). | the playful (i.e., not overtly functional) combination of objects is considered a potential ontogenetic and phylogenetic precursor of technical problem solving abilities, as it may lead to affordance learning and honing of mechanical skills. we compared such activities in 6 avian species: 3 psittaciforms (black-headed caiques, red-shouldered macaws, and goffin cockatoos) and 3 corvids (new caledonian crows, ravens, and jackdaws). differences in the type and frequency of object combinations were ... | 2015 | 25437492 |
| can hook-bending be let off the hook? bending/unbending of pliant tools by cockatoos. | the spontaneous crafting of hook-tools from bendable material to lift a basket out of a vertical tube in corvids has widely been used as one of the prime examples of animal tool innovation. however, it was recently suggested that the animals' solution was hardly innovative but strongly influenced by predispositions from habitual tool use and nest building. we tested goffin's cockatoo, which is neither a specialized tool user nor a nest builder, on a similar task set-up. three birds individually ... | 2017 | 28878059 |
| social transmission of tool use and tool manufacture in goffin cockatoos (cacatua goffini). | tool use can be inherited, or acquired as an individual innovation or by social transmission. having previously reported individual innovative tool use and manufacture by a goffin cockatoo, we used the innovator (figaro, a male) as a demonstrator to investigate social transmission. twelve goffins saw either demonstrations by figaro, or 'ghost' controls where tools and/or food were manipulated using magnets. subjects observing demonstrations showed greater tool-related performance than ghost cont ... | 2014 | 25185997 |
| object permanence in the goffin cockatoo (cacatua goffini). | the ability to represent hidden objects plays an important role in the survival of many species. in order to provide an inclusive synopsis of the current benchmark tasks used to test object permanence in animals for a psittacine representative, we tested eight goffin cockatoos (cacatua goffini) on stages 3-6 of piagetian object permanence as well as derivations of spatial transposition, rotation, and translocation tasks. subjects instantly solved visible displacement 3b and 4a but showed an exte ... | 2014 | 23875920 |
| explorative learning and functional inferences on a five-step means-means-end problem in goffin's cockatoos (cacatuagoffini). | to investigate cognitive operations underlying sequential problem solving, we confronted ten goffin's cockatoos with a baited box locked by five different inter-locking devices. subjects were either naïve or had watched a conspecific demonstration, and either faced all devices at once or incrementally. one naïve subject solved the problem without demonstration and with all locks present within the first five sessions (each consisting of one trial of up to 20 minutes), while five others did so af ... | 2013 | 23844247 |
| goffin cockatoos wait for qualitative and quantitative gains but prefer 'better' to 'more'. | evidence for flexible impulse control over food consumption is rare in non-human animals. so far, only primates and corvids have been shown to be able to fully inhibit the consumption of a desirable food item in anticipation for a gain in quality or quantity longer than a minute. we tested goffin cockatoos (cacatua goffini) in an exchange task. subjects were able to bridge delays of up to 80 s for a preferred food quality and up to 20 s for a higher quantity, providing the first evidence for tem ... | 2013 | 23485873 |
| potential use of long-acting injectable oxytetracycline for treatment of chlamydiosis in goffin's cockatoos. | to determine the potential use of parenteral therapy in the treatment of chlamydiosis in psittacine birds, the disposition and toxicity of a long-acting oxytetracycline (otc) was evaluated in goffin's cockatoos. following intramuscular and subcutaneous administration of 50 to 100 mg/kg body weight, plasma otc concentrations of 7 to 15 micrograms/ml were obtained 3 hr following injection and declined with a terminal half-life between 8.9 to 14.7 hr. plasma concentrations in excess of 1.0 microgra ... | 2013 | 2322228 |
| the keybox: shape-frame fitting during tool use in goffin's cockatoos (cacatua goffiniana). | the ability to move an object in alignment to a surface develops early in human ontogeny. however, aligning not just your own body but also the object itself in relation to a surface with a specific shape requires using landmarks rather than the own body as a frame of reference for orientation. the ability to do so is considered important in the development of tool use behaviour in human and non-human animals. aside from humans, with the exception of a single study on habitually tool using prima ... | 2017 | 29117242 |
| decision-making flexibility in new caledonian crows, young children and adult humans in a multi-dimensional tool-use task. | the ability to make profitable decisions in natural foraging contexts may be influenced by an additional requirement of tool-use, due to increased levels of relational complexity and additional work-effort imposed by tool-use, compared with simply choosing between an immediate and delayed food item. we examined the flexibility for making the most profitable decisions in a multi-dimensional tool-use task, involving different apparatuses, tools and rewards of varying quality, in 3-5-year-old child ... | 2020 | 32160191 |
| object manufacture based on a memorized template: goffin's cockatoos attend to different model features. | although several nonhuman animals have the ability to recognize and match templates in computerized tasks, we know little about their ability to recall and then physically manufacture specific features of mental templates. across three experiments, goffin cockatoos (cacatua goffiniana), a species that can use tools in captivity, were exposed to two pre-made template objects, varying in either colour, size (long or short) or shape (i or l-shaped), where only one template was rewarded. birds were ... | 2020 | 33113033 |
| using an innovation arena to compare wild-caught and laboratory goffin's cockatoos. | the ability to innovate, i.e., to exhibit new or modified learned behaviours, can facilitate adaptation to environmental changes or exploiting novel resources. we hereby introduce a comparative approach for studying innovation rate, the 'innovation arena' (ia), featuring the simultaneous presentation of 20 interchangeable tasks, which subjects encounter repeatedly. the new design allows for the experimental study of innovation per time unit and for uncovering group-specific problem-solving abili ... | 2020 | 32457402 |
| tool making cockatoos adjust the lengths but not the widths of their tools to function. | the ability to innovatively use or even manufacture different tools depending on a current situation can be silhouetted against examples of stereotyped, inborn tool use/manufacture and is thus often associated to advanced cognitive processing. in this study we confronted non-specialized, yet innovative tool making birds, goffin's cockatoos (cacatua goffiniana), with an apparatus featuring an out-of-reach food reward that could be placed at different distances from a tool opening. alternatively, ... | 2018 | 30403673 |
| tool use in goffin's cockatoos: shape/frame matching. | nonhuman tool use is no longer questioned; the issues now are whether such use is mostly inflexible and innately specified or involves experience, innovation, adaptation, and cognitive planning, and how many species qualify. habl and auersperg (plos one, 12(11):e0186859, 2017) have shown that some goffin's cockatoos (cacatua goffiniana) respond in novel ways to a tool-use task that nonhuman primates and young children find somewhat challenging. | 2019 | 29450788 |
| inference by exclusion in the red-tailed black cockatoo (calyptorhynchus banksii). | inference by exclusion is the ability to select a given option by excluding the others. when designed appropriately, tests of this ability can reveal choices that cannot be explained by associative processes. over the past decade, exclusion reasoning has been explored in several non-human taxonomic groups, including birds, mainly in corvids and parrots. to increase our understanding of the taxonomic distribution of exclusion reasoning and, therefore, its evolution, we investigated exclusion perf ... | 2019 | 29316266 |