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Extreme self-decapitation in sea-slug: the head part is able to regenerate full body including functional heart and kidney in 20 days. It is a possible adaptive response to endoparasite infesting the body part.
📄 Mitoh & Yusa (2021) Extreme autotomy and whole-body regeneration in photosynthetic sea slugs. Current Biology 31:R233–R234

in the most endangered sea species: purge of deleterious in population size of fewer than 20.
📄 Gross (2021) Cetaceans balancing on the brink. Current Biology 31:R215–R218

Convergent : has independently evolved twice in bats.
📄 Nojiri et al (2021) Embryonic evidence uncovers convergent origins of laryngeal echolocation in bats. Current Biology

Nice case of acoustic : male exploits female antipredator response to mobbing alarm calls to manipulate her and prevent her from prematurely ending sexual interactions.
📄 Dalziell et al (2021) Male lyrebirds create a complex acoustic illusion of a mobbing flock during courtship and copulation. Current Biology

Vivid colors have evolved in many animal species as signal of quality to attract female partners. In sailfin tetra, conspicuous males are also under high risk of predation. In response, they rely on cautious strategies and better spatial cognition skills.
📄 Pinto et al (2021) Attractive males are cautious and better learners in the sailfin tetra. Animal Behaviour 172:103–111

Red squirrels may have found the fountain of youth: keeping the same neighbors over time.
📄 Chaine (2021) Social evolution: big benefits of BFFs. Current Biology 31:R72–R74

Contrary to popular belief, the has very limited influence on biology. Here is a nice counterexample. The growth rate of a reef species is affected by lunar cycles, possibly due to alteration of diel vertical migrations of its preys.
📄 Shima et al (2021) Lunar rhythms in growth of larval fish. Proceedings of the Royal Society B: Biological Sciences 288:20202609

Ok, it's on twitter, but I am looking forward to reading some talks in this online scientific on animal behaviour.

in : mice share emotions of their partners by observing them experiencing fear or relief.
📄 Smith et al. (2021) Anterior cingulate inputs to nucleus accumbens control the social transfer of pain and analgesia. Science 371:153–159

Nice experimental design using artifact to study mating preference in .
📄 Romano & Stefanini (2021) Bio-robotic cues show how the Trinidadian guppy male recognises the morphological features of receptive females. Behavioural Processes 182:104283

Tragedy of the commons and root proliferation in response to local competition: game theory in plant.
📄 Cabal et al. (2020) The exploitative segregation of plant roots. Science 370:1197–1199

and origami-like structure: beetles survive in-flight wing collision by collapsible wings
📄 Phan & Park (2020) Mechanisms of collision recovery in flying beetles and flapping-wing robots. Science 370:1214–1219


Given one square leaning on another, what is the ratio of the orange area and pink area?


Inclusive practices: still a long way to fight gender or racial bias in science textbooks but alternative representations exist.
📄 Simpson et al (2021) Teaching between the lines: representation in science textbooks. Trends in Ecology and Evolution 36:4–8

How to appear bigger than you are? Male tree crickets use home-made baffle as sound-amplifier when communicating with females.
📄 Deb et al (2020) Baffling: a condition-dependent alternative mate attraction strategy using self-made tools in tree crickets. Proceedings of the Royal Society B: Biological Sciences 287:20202229

Know your enemy: snapping assesses recent victory history of their opponents before engaging in a fight against them.
📄 Dinh et al (2020) Winner effects and switching assessment strategies facilitate fast and frugal decisions in territorial contests. Animal Behaviour 170:189–205

Unusual case of acoustic batesian in spider species which mimics stridulation against predator.
📄 Pekár et al (2020) Spiders mimic the acoustic signalling of mutillid wasps to avoid predation: startle signalling or Batesian mimicry? Animal Behaviour 170:157–166

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