Stories with Tag crows

• Crows can recognize geometric regularity

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  Posted: 2025-04-17 14:20:13

  Verbose tl;dr

  A new study demonstrates that crows can discriminate between patterns with regular and irregular geometric arrangements. Researchers presented crows with images featuring dot patterns and trained them to identify either regular or irregular patterns as rewarding. The crows successfully learned to distinguish between the two types of patterns, even when presented with novel configurations, suggesting they possess an abstract understanding of geometric regularity, similar to primates and human infants. This ability may be linked to the crows' complex social lives and need to recognize individuals and their relationships.

  In a groundbreaking exploration of avian cognitive abilities, researchers from the University of Tübingen and Ruhr University Bochum have conducted a series of meticulously designed experiments demonstrating that crows possess the remarkable capacity to discern and categorize visual patterns based on their geometric regularity. This sophisticated cognitive feat, previously believed to be largely confined to the realm of human intelligence and higher primates, adds another layer of complexity to our understanding of the corvid brain.

  The study, published in the esteemed journal Current Biology, details how carrion crows (Corvus corone) were systematically trained to differentiate between images exhibiting regular geometric patterns, such as squares and circles, and those displaying irregular, more chaotic configurations. Through a carefully controlled operant conditioning paradigm, involving rewards for correct identifications, the crows progressively learned to associate specific visual stimuli with positive outcomes. Astonishingly, this learned association extended beyond the specific training examples to encompass novel geometric patterns, indicating a capacity for abstract conceptualization rather than mere rote memorization.

  The researchers meticulously eliminated alternative explanations, such as differences in luminance or contour complexity, ensuring that the crows' performance genuinely reflected their ability to perceive geometric regularity as an inherent property of the visual stimuli. Furthermore, the experiments included a transfer phase, wherein the crows were presented with entirely new patterns they had not encountered during the training phase. The crows successfully classified these novel patterns according to their geometric regularity, providing compelling evidence for their capacity to generalize the learned concept to unfamiliar examples.

  This discovery holds significant implications for the field of comparative cognition, challenging existing assumptions about the cognitive limitations of non-human animals. It suggests that the neural architecture underpinning the perception of geometric regularity may be more evolutionarily ancient and widespread than previously thought. Furthermore, it highlights the remarkable intelligence of corvids, solidifying their position among the most cognitively sophisticated members of the avian world. The ability to recognize and categorize abstract visual concepts, such as geometric regularity, may confer significant adaptive advantages, potentially contributing to their exceptional problem-solving abilities and adaptability in diverse ecological contexts. Further investigations are undoubtedly warranted to fully elucidate the neural mechanisms underlying this fascinating cognitive capacity and explore the extent to which similar abilities exist in other avian and non-avian species.

  • crows
  • corvids
  • birds
  • Animal Cognition
  • Intelligence
  • geometric regularity
  • pattern recognition
  • visual perception
  • Cognitive Science
  • ornithology
  • animal behavior
  • Zoology
  • Science

  Summary of Comments ( 67 )
  https://news.ycombinator.com/item?id=43717251

  Verbose tl;dr

  Hacker News commenters discuss the intelligence of crows and other corvids, with several pointing out prior research showcasing their impressive cognitive abilities like tool use, problem-solving, and social learning. Some express skepticism about the study's methodology and whether it truly demonstrates an understanding of "geometric regularity," suggesting alternative explanations like a preference for symmetry or familiarity. Others delve into the philosophical implications of animal cognition and the difficulty of defining "intelligence" across species. A few commenters share anecdotes of personal encounters with crows exhibiting intelligent behavior, further fueling the discussion about their complex cognitive abilities. The overall sentiment leans towards acknowledging the remarkable intelligence of crows while also maintaining a healthy scientific skepticism towards interpreting the results of any single study.

  The Hacker News post "Crows can recognize geometric regularity," linking to a Phys.org article about the same topic, has generated several comments discussing the research and its implications.

  Several commenters express awe and fascination at the cognitive abilities of crows, with some highlighting the growing body of evidence demonstrating their intelligence. One commenter points out that crows have been shown to understand water displacement, tool use, and even have funerals for their dead. This commenter emphasizes the remarkable nature of these findings given the evolutionary distance between corvids and primates.

  Another thread of discussion revolves around the methodology of the study and what it truly demonstrates. Some question whether the crows are actually recognizing "geometric regularity" in the abstract sense, or if they are simply responding to visual patterns and similarities. A commenter suggests that further research could explore whether crows perceive these patterns similarly to how humans perceive them, or if their understanding is based on different criteria. Another user proposes a control experiment to rule out the possibility that the crows are simply choosing patterns based on factors like brightness or contrast, rather than geometric regularity.

  Several users draw comparisons between crows and other intelligent animals, like octopuses and dolphins, marveling at the diverse evolution of intelligence in the animal kingdom. One commenter speculates about the potential advantages of recognizing geometric patterns in nature, such as identifying camouflaged prey or building nests.

  There's also a brief exchange about the potential ethical implications of recognizing advanced intelligence in animals, with one user suggesting it could lead to reconsiderations of our relationship with and treatment of these species.

  Finally, some comments are more lighthearted, expressing admiration for crows or sharing anecdotes about their own encounters with these birds. One commenter humorously suggests that crows may be using their geometric understanding to build increasingly elaborate and stylish nests.

• Magpies and Crows Are Using "Anti-Bird Spikes" to Make Their Nests (2023)

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  Posted: 2025-03-10 14:33:10

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  Ironically, birds like magpies and crows are using anti-bird spikes, intended to deter them from nesting, as nesting material. These intelligent corvids incorporate the sharp spikes into their nests, potentially providing extra protection against predators or strengthening the nest structure. While the spikes may deter some smaller birds, they've inadvertently provided resourceful corvids with a readily available and robust building material, highlighting the adaptability and ingenuity of these species.

  In a fascinating display of avian ingenuity that borders on ironic, recent observations documented in the Audubon Magazine article, "Magpies and Crows Are Using 'Anti-Bird Spikes' to Make Their Nests," reveal that corvids, specifically magpies and crows, are repurposing anti-bird spikes, devices explicitly designed to deter their presence, as nesting materials. These intelligent birds, renowned for their problem-solving abilities and adaptability, are seemingly undeterred by the intended purpose of these sharp deterrents. Instead, they recognize the spikes' inherent utility as sturdy and readily available construction elements for their nests. This behavior demonstrates a remarkable level of resourcefulness, highlighting the corvids' capacity to exploit human interventions in their environment for their own benefit. The spikes, typically composed of metal or plastic and arranged in a dense array to prevent birds from landing and roosting on ledges, windowsills, and other architectural features, now inadvertently contribute to the structural integrity of corvid nests. This unintended consequence of anti-bird technology showcases the adaptability of these avian species and underscores the complex interplay between human interventions and the natural world. Furthermore, it raises intriguing questions regarding the effectiveness of such deterrents in the long run, as nature, particularly in the form of highly intelligent creatures like corvids, often finds a way to circumvent human-designed obstacles. This phenomenon serves as a compelling testament to the resourcefulness and adaptability of these birds in an increasingly urbanized environment where traditional nesting materials may be less accessible. By incorporating these manufactured spikes into their nests, magpies and crows exhibit a remarkable capacity to innovate and utilize readily available resources, even those intended to repel them, ultimately turning a tool of exclusion into a building block for their homes.

  • birds
  • magpies
  • crows
  • nests
  • bird spikes
  • anti-bird spikes
  • adaptation
  • urban wildlife
  • animal behavior
  • ornithology
  • wildlife
  • nature
  • ironies of nature
  • 2023

  Summary of Comments ( 24 )
  https://news.ycombinator.com/item?id=43321109

  Verbose tl;dr

  HN commenters generally found the magpies' adaptation of anti-bird spikes for nest-building amusing and a testament to their intelligence. Some pointed out the irony of humans trying to outsmart nature, only to have nature adapt and use the "defense" to its advantage. A few noted the sturdiness and readily available nature of the spikes as ideal nest-building material, comparing it to humans repurposing materials. Others expressed concern that the spikes could injure the birds or their young, while some dismissed this concern based on the birds' apparent ability to navigate the spikes safely. The potential for increased nest security due to the spikes was also mentioned. Finally, some commenters shared similar anecdotal observations of birds using human-made materials in unexpected ways for nest construction.

  The Hacker News post titled "Magpies and Crows Are Using "Anti-Bird Spikes" to Make Their Nests (2023)" has generated several comments discussing the irony of the situation and the adaptability of corvids.

  Several commenters pointed out the cleverness and adaptability of crows and magpies, highlighting their ability to turn a supposed deterrent into a resource. One commenter mentioned how this situation reminds them of how nature "finds a way," echoing the famous line from Jurassic Park. Another user compared the birds' behavior to "guerrilla gardening" and using the enemy's tools against them.

  The discussion also touched upon the unintended consequences of human interventions in nature. One commenter wryly observed that the spikes now serve as "pro-bird nesting spikes." Others expressed a sense of amusement at the situation, appreciating the birds' ingenuity in overcoming human-designed obstacles. A couple of users even jokingly suggested that the next iteration of anti-bird technology might involve lasers.

  Some users shared anecdotal observations of similar bird behavior, such as pigeons incorporating wire into their nests. This further reinforced the theme of birds adapting and utilizing available materials, even those intended to deter them.

  A few comments speculated on the practical advantages the spikes might offer the birds. Suggestions included increased nest stability, protection from predators, and a ready supply of nesting material. One user hypothesized that the spikes might even help to insulate the nest.

  Finally, there were a few brief comments expressing general admiration for corvid intelligence. One user simply declared, "Crows are awesome," while another remarked on their impressive problem-solving abilities.