
バーンフクロウは、獲物に近づく際に着陸力を低減させることで、音響的なカムフラージュを実現し、狩猟成功率を高めている。


coremsg

Predator-prey arms races have led to the evolution of finely-tuned disguise strategies. While the theoretical benefits of predator camouflage are well established, no study has yet been able to quantify its consequences for hunting success in natural conditions. We used high-resolution movement data to quantify how barn owls ( Tyto alba ) conceal their approach when using a sit-and-wait strategy. We hypothesized that hunting barn owls would modulate their landing force, potentially reducing noise levels in the vicinity of prey. Analysing 87,957 landings by 163 individuals equipped with GPS tags and accelerometers, we show that barn owls reduce their landing force as they approach their prey, and that landing force predicts the success of the following hunting attempt. Landing force also varied with the substrate, being lowest on man-made poles in field boundaries. The physical environment therefore affects the capacity for sound camouflage, providing an unexpected link between predator-prey interactions and land-use. Finally, hunting strike forces in barn owls were the highest recorded in any bird, relative to body mass, highlighting the range of selective pressures that act on landings and the capacity of these predators to modulate their landing force. Overall, our results provide the first measurements of landing force in a wild setting, revealing a new form of motion-induced sound camouflage and its link to hunting success.

### Competing Interest Statement

The authors have declared no competing interest.

Landing force reveals new form of motion-induced sound camouflage in a wild predator

猛禽の静かな接近-バーンフクロウの狩猟成功率を予測する着陸力


猛禽の静かな接近 - バーンフクロウの狩猟成功率を予測する着陸力


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ブンブンバチは糸引き課題において、連続した糸を選好的に引くが、これは手段-目的理解というよりは、視覚的な特徴の一致に基づく単純な連合学習によるものである。


Bumblebees ( Bombus terrestris ) have been shown to engage in string-pulling behavior to access rewards. The objective of this study was to elucidate whether bumblebees display a means-end comprehension in string-pulling task. We presented bumblebees with tasks involving choosing between two options: one where a string is connected to an artificial flower containing a reward and the other involving interrupted strings. Surprisingly, bumblebees displayed a consistent preference for pulling connected strings over interrupted ones after training with a stepwise pulling technique. Intriguingly, when exposed to novel string colors, bees continued to exhibit a bias towards pulling the connected string. This suggests that bumblebees engage in featural generalization of the visual display of the string connected to the flower in this task. When the bumblebees were confronted with coiled connected strings during the testing phase, they failed to identify and reject interrupted strings. This finding underscores the significance of visual consistency in enabling the bumblebees to perform the task successfully. Our results suggest that bumblebees to distinguish between continuous strings and interrupted strings relies on a combination of image matching and associative learning, rather than means-end understanding. These insights contribute to a deeper understanding of the cognitive processes employed by bumblebees when tackling complex spatial tasks.

### Competing Interest Statement

The authors have declared no competing interest.

Does bumblebee preference of continuous over interrupted strings in string-pulling tasks indicate means-end comprehension?

ブンブンバチの連続した糸引き行動は手段-目的理解を示すのか-


ブンブンバチの連続した糸引き行動は手段-目的理解を示すのか?



犬は人間の行動や感情をかなり理解しており、人間との絆を深めている。


A reflection on the convergence of our lives with these unforgettable canines.

How Much Do Dogs Understand About Us?

犬は私たちについてどれくらい理解しているのか


動物は環境を認知し、他の主体と相互作用しながら複雑な課題を遂行する能力を示しているが、現在のAIシステムはこれらの能力に及ばない。EgoPetデータセットは、動物の視点から捉えた自己運動と相互作用の多様な事例を提供し、動物の行動理解と、動物に匹敵するAIシステムの開発を促進する。


動物の視点から捉えた自己運動と相互作用のデータセット-egopet-


動物の視点から捉えた自己運動と相互作用のデータセット「EgoPet」
