Birds Build Nests with Snake Skin to Protect From Predators

Many species of birds use shed snake skin when building nests, but this behavior is poorly understood. In a new study, Cornell University ornithologists used comparative and experimental approaches to suggest that the evolution of this behavior is mediated by nest morphology and predator community. They used a series of experiments and comparisons to test four hypotheses (nest predation, nest microbiota, nest ectoparasites, and social signaling) that snake skin confers fitness effects, and the predation hypothesis found support for.



Great Crested Flycatcher (Myialchus crinitus) are famous for using snake skin to construct their nests. Image credit: Barbara Taylor/Macaulay Library.

“What do snakes eat? They eat a lot of rats and small mammals,” said Dr. Vanya Lower, lead author of the study.

“Given the evolutionary history of harmful interactions between small-bodied predators that are commonly eaten by snakes, these predators should become fearful of snake skin in their nests.”

“It may change the decision-making process for whether or not to nest.”

“Birdwatchers have been recording the use of snakeskin in nests for centuries, and have speculated that snakeskin occurs more frequently in hollow nests, but no one has tested this theory. There was no one there.”

“We were trying to understand why birds spend so much time and effort finding this strange substance.”

First, Dr. Lower and his colleagues looked at the literature and found that 78 species in 22 families have been reported to use shed snake skin for nest building.

All but one of these species are passerines, and in a comparative analysis, the researchers found that this behavior was disproportionately observed in cavity-nesting species.

Next, they examined a subsample of North American species, all of which are reported to use snake skin for nest construction, and found that between cavity-nesting species and open-cup nesting species, snake skin We investigated whether the proportion of nests with

The analysis suggested that the proportion of nests with snake skin was approximately 6.5 times higher in cavity nests than in open cup nest species.

“The proportion of nests that had snake skin in the nest description was about 6.5 times higher in cavity nests than in open cup nests,” Dr. Lower said.

“This was really, really cool and suggested to us that these two completely independent data series were telling very similar stories.”

To test the benefits that cavity-nesting birds derive from snake skin, scientists investigated how snake skin reduces nest predation, reduces harmful nest ectoparasites, and benefits birds. We investigated whether they can alter the microbial community or serve as a signal of parental quality. Parents make more efforts to raise their children.

Of these ideas, the results supported the nest predation hypothesis, but only in cavity nests.

For the experiment, the authors placed two quail eggs in more than 60 nest boxes and more than 80 inactive robin nests set up around Ithaca’s Monkey Run Natural Area. Cavity nests and open cup nests were simulated.

Some nests received snake skins collected from local snake breeders, while others did not.

Every three days for two weeks, the team used a ladder to climb through the monkey run to the nest and check for eggs.

Trail cameras revealed that while small mammal and bird nest predators visit open cup nests, only small mammals, namely flying squirrels, visit nest boxes.

“If you were in a hive like that and you had snake skin, you would have a much better chance of surviving those 14 days,” Dr. Lower said.

“The benefits of the material are most strongly expressed in hollow nests.”

team’s result appear in american naturalist.

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Vanya G. Lower others. Evolution of the use of snake skin in bird nests. american naturalistpublished online on December 17, 2024. doi: 10.1086/733208

This article is a version of a press release provided by Cornell University.

Source: www.sci.news

To build Britain as a leading AI force, we must stand up to tech giants | By John Norton

Sir Keir Starmer does not create visions. But last Monday, he broke a lifelong habit. Speech at University College London. It was about AI, which he sees as “the defining opportunity of our generation.” He declared that Britain was “the land of Babbage, Loveless and Turing” and, of course, “the country that birthed the modern computer and the World Wide Web.” Please mark my words. Britain will become one of the great AI superpowers. ”

It's kind of exciting. Within days of taking office, the Prime Minister invited Matt Clifford, a clever engineer from Central Casting, to think about “how to seize the opportunity in AI''. Clifford scored 50 points. AI Opportunity Action Plan Starmer fully accepted this, saying he would “take full responsibility for the British state”. He also named Clifford AI Opportunity Advisor Supervise the implementation of the plan and report directly to him. It's only a matter of time until then solar We call him “Britain's AI emperor.”

Clifford's appointment is both predictable and puzzling. That was to be expected, as he had been hanging around government for a while: Rishi Sunak, for example, hosted the AI ​​Safety Summit and approached him to set up the UK Safety Summit. AI safety unit. It's puzzling because he's already made so much money in technology. External Interests Register This will be a fairly long scroll. Several media and technology executives said to financial times They were concerned that Clifford, who had founded a successful investment firm with offices around the world, was being given too much influence over AI policy.

Damian Collins, a former Conservative technology secretary, said Clifford was “clearly a very capable person” but said he was “concerned about the balance of interests represented and how they are represented.” “It will be done,” he said. If Mr Starmer really believes that AI is a game-changing technology, it is strange that his chief adviser would be so involved in such an important game.

Collins was referring to a particularly hot topic. It is a routine copyright violation by tech companies that train AI models on the creative works of others without permission, approval, or payment. The latest revelations about this practice come from new, unredacted documents. US lawsuit This shows that the training dataset for Meta's Llama AI includes a huge database of pirated books collected from the internet.

Recommendation 24 of the plan calls for reform of the UK text and data mining regime. And the argument that “the current uncertainty around intellectual property (IP) is hindering innovation and undermining our broader ambitions for growth in AI and the creative industries” is a strong argument for many in these industries. made people furious. “There is no 'uncertainty' in the UK text and data mining regime,” he said. Creative Rights in the AI ​​Coalition. “UK copyright law does not allow text or data mining for commercial purposes without a license. The only uncertainty is who will use Britain's creative crown as training material without permission and who will That's how you got it.”

Much of Clifford's plan seems sensible (albeit expensive). For example, building a national computing infrastructure for AI. Improving university research capabilities. Train tens of thousands of new AI professionals. Promote public-private partnerships to maximize the UK's interests in 'frontier' AI. Ensure strong technical and ethical standards to oversee the development and deployment of AI.

All of this is a refreshing change from the empty fuss about 'Global Britain' of the Johnson-Snak-Truss era. The plan's stated ambition to position the UK as an “AI maker rather than an AI taker” is that the UK has real potential in this area but lacks the resources to realize that potential. This suggests a candid recognition. But making that happen means we have to face two troubling truths.

The first is that this powerful technology is controlled by a small number of giant companies, none of which are based in the UK. Their power lies not only in their capital and human resources, but also in the vast physical infrastructure of data centers they own and manage. This means that any nation wishing to operate in this field must get along with them.

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The UK Government needs to do a lot in this regard. The current attitude towards business is the snobbish attitude exhibited by Technology Secretary Peter Kyle, who said the Government needed to take a 'Government is' attitude.feeling humble” and uses a “national strategy” when dealing with technology giants, rather than using the threat of new legislation to influence developments in areas such as frontier artificial intelligence. In other words, the UK should treat these organizations as nation-states. Clearly, Kyle doesn't realize that appeasement is the art of being nice to the alligator in the hopes that it will eat you in the end.

Another troubling truth is that even though AI is powerful, economists like Nobel Prize winners Daron Acemoglu The general economic impact, at least in the short term, is believed to be significantly smaller than technology evangelists believe. Even worse, Economist Robert Gordon once pointed out thatgeneral-purpose technologies take a long time to have a significant impact. The message to the Prime Minister is clear. Becoming an “AI superpower” may take at least several election cycles.

Source: www.theguardian.com