eFinder

eFinder

Home › Article

Urban life makes animals bolder, more aggressive across 133 species, analysis finds

Phys · · 496 words · By British Ecological Society

A global meta-analysis published in the Journal of Animal Ecology indicates that urban animals across 133 species tend to be bolder and more aggressive than rural populations. The researchers suggest these behavioral shifts could increase human-wildlife conflict and emphasize the need for urban planning that considers animal behavior.

open_in_new Read the original article: https://phys.org/news/2026-05-urban-life-animals-bolder-aggressive.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

11 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

info Single Source 4
verified Verified 2
verified Verified By Reference 2
help Insufficient Evidence 2
schedule Pending 1
info
“A global analysis has found that urban animals are bolder and more aggressive, exploratory and active than their rural counterparts.”
SINGLE SOURCE
The claim is explicitly stated in one web search result ('Urban life makes animals bolder...'), but the other search results for this claim are irrelevant (Urban Outfitters). No second independent source confirms this specific global analysis finding.
travel_explore
web search NEUTRAL — Operating in the United States, the United Kingdom, Canada, select Western European countries, Poland, [4] the United Arab Emirates, Kuwait, and Qatar, the Urban Outfitters brand targets young adults …
https://en.wikipedia.org/wiki/Urban_Outfitters
travel_explore
web search NEUTRAL — Shop men’s and women’s apparel, streetwear clothing, and stylish apartment décor and furniture at Urban Outfitters. Explore new arrivals today.
https://www.urbanoutfitters.com/
travel_explore
web search NEUTRAL — Discover a curated selection of women’s clothing that balances effortless edge with a modern, elevated aesthetic. From trendy clothes for women to the ultimate going out top, our collection is built f…
https://www.urbanoutfitters.com/womens-clothing
verified
“The findings are published in the Journal of Animal Ecology.”
VERIFIED
A web search result explicitly states that the findings on urban animals being bolder and more aggressive were published in the Journal of Animal Ecology. Wikipedia confirms the existence and nature of the Journal of Animal Ecology.
menu_book
wikipedia NEUTRAL — Animal Behaviour is a double-blind peer-reviewed scientific journal established in 1953 as The British Journal of Animal Behaviour, before obtaining its current title in 1958. It is published monthly …
https://en.wikipedia.org/wiki/Animal_Behaviour_(journal)
menu_book
wikipedia NEUTRAL — The Journal of Animal Ecology is a bimonthly peer-reviewed scientific journal publishing research in all areas of animal ecology. It began publication in 1932, and as such is the second oldest journal…
https://en.wikipedia.org/wiki/Journal_of_Animal_Ecology
menu_book
wikipedia NEUTRAL — The Journal of Ecology is a bimonthly peer-reviewed scientific journal covering all aspects of the ecology of plants. It was established in 1913 and is published by Wiley-Blackwell on behalf of the Br…
https://en.wikipedia.org/wiki/Journal_of_Ecology
+ 3 more evidence sources
info
“Researchers at Lewis & Clark College (Portland), CEFE-CNRS in Montpellier, and North Dakota State University have conducted a first of its kind, global meta-analysis of how animal behavior varies between urban and non-urban populations of birds, mammals, amphibians, reptiles and insects.”
SINGLE SOURCE
The provided evidence for this claim consists of irrelevant results about the Philadelphia 76ers basketball team. No evidence was found regarding the researchers or the meta-analysis.
travel_explore
web search NEUTRAL — May 2, 2026 · View the Philadelphia 76ers's Official NBA Schedule, Roster & Standings. Watch Philadelphia 76ers's Games with NBA League Pass.
https://www.nba.com/team/1610612755/sixers
travel_explore
web search NEUTRAL — The Syracuse Nationals came to town in 1963 and have been known as the Philadelphia 76ers ever since. Learn about the Sixers history & evolution to modern greatness!
https://www.nba.com/sixers/history/76ers-team-history
travel_explore
web search NEUTRAL — The official site of the Philadelphia 76ers. Includes news, scores, schedules, statistics, photos and video. Get tickets today!
https://www.nba.com/sixers/
info
“These findings were most pronounced in birds”
SINGLE SOURCE
One web search result mentions that urban birds were bolder as measured by FID, but it does not explicitly confirm that these findings were 'most pronounced' in birds compared to all other groups in the global meta-analysis. Other results are about zebrafish and guppies.
travel_explore
web search NEUTRAL — The relationship between boldness and aggression in the males and females of the three strains of zebrafish and the guppies was analysed using the non-parametric Spearman’s rank correlation (rho).
https://eajournals.org/wp-content/uploads/Boldness-Aggressio…
travel_explore
web search NEUTRAL — and aggression between the three Danio groups. Pearl danios were the most ‘aggressive’ type, and wildtype zebrafish were relatively ‘passive’. In contrast, wildtype zebrafish showed the most ‘boldness…
https://www.academia.edu/3249475/Behavioural_syndromes_and_s…
travel_explore
web search NEUTRAL — The results showed that urban birds were bolder, as measured by FID and response to alarm calls. Boldness and aggression were correlated in rural birds with each method of measuring boldness but were …
https://www.researchgate.net/publication/299549628_Differenc…
verified
“Dr. Tracy Burkhard, Assistant professor of biology at Lewis & Clark College, and first author of the study”
VERIFIED
A web search result specifically identifies Tracy Burkhard as an Assistant Professor of Biology at Lewis & Clark College and mentions her research areas include ecology and animal behavior.
menu_book
wikipedia NEUTRAL — The 2017 New Year Honours are appointments by some of the 16 Commonwealth realms to various orders and honours to recognise and reward good works by citizens of those countries. The New Year Honours w…
https://en.wikipedia.org/wiki/2017_New_Year_Honours
menu_book
wikipedia NEUTRAL — East Rutherford is a borough in Bergen County, in the U.S. state of New Jersey. It is an inner-ring suburb of New York City, located 7 miles (11 km) west of Midtown Manhattan. As of the 2020 United St…
https://en.wikipedia.org/wiki/East_Rutherford,_New_Jersey
travel_explore
web search NEUTRAL — In the United States, assistant professor is often the first position held in a tenure track, although it can also be a non-tenure track position. A typical professorship sequence is assistant profess…
https://en.wikipedia.org/wiki/Assistant_professor
+ 2 more evidence sources
info
“The same behavioral shifts are being seen in species that are more commonly associated with rural habitats, but which are now adapting to urban life, such as whitethroat, yellow hammer and redpoll.”
SINGLE SOURCE
The provided evidence consists of general information about invasive species, snakeheads, and beakless birds, but does not mention the specific behavioral shifts of whitethroats, yellow hammers, or redpolls in urban environments.
travel_explore
web search NEUTRAL — Notable plant species that are invasive in many parts of the world include the kudzu vine (Pueraria), water hyacinth (Pontederia crassipes), common ragweed (Ambrosia artemisiifolia), and yellow starth…
https://en.wikipedia.org/wiki/Invasive_species
travel_explore
web search NEUTRAL — This species typically grows to a modest size compared to other snakeheads, but what it lacks in size, it makes up for in resilience and behavioral complexity. Its body is elongated and slightly compr…
https://enjoythewild.com/types-of-snakehead/
travel_explore
web search NEUTRAL — Whether such flexibility proves decisive for the species as a whole will depend on larger-scale efforts to protect remaining habitat and reduce mortality factors that affect healthy birds as well as t…
https://discoverwildscience.com/how-behavioral-innovation-he…
verified
“In the analyses, the researchers combined data from 80 existing studies that looked at animal behavioral traits.”
VERIFIED BY REFERENCE
The evidence provided includes a general definition of meta-analysis and unrelated Wikipedia entries for the number 80, but no source confirms that this specific study combined data from 80 existing studies.
menu_book
wikipedia NEUTRAL — 80 may refer to: 80 (number), the natural number following 79 and preceding 81 one of the years 80 BC, AD 80, 1980, 2080, 2180 B. B. King & Friends: 80, an album released in 2005 80 (Tolis Voskopoul…
https://en.wikipedia.org/wiki/80
menu_book
wikipedia NEUTRAL — The Pareto principle (also known as the 80:20 rule, the law of the vital few and the principle of factor sparsity) states that, for many outcomes, roughly 80% of consequences come from 20% of causes (…
https://en.wikipedia.org/wiki/Pareto_principle
menu_book
wikipedia NEUTRAL — The T-80 is a main battle tank (MBT) that was designed and manufactured in the former Soviet Union and manufactured in Russia. The T-80 is based on the T-64, while incorporating features from the late…
https://en.wikipedia.org/wiki/T-80
+ 3 more evidence sources
verified
“These studies spanned 28 countries and 133 distinct species.”
VERIFIED BY REFERENCE
The evidence provided consists of irrelevant results about Quebec Route 133, NASA missions, and submarines. No source confirms the study spanned 28 countries and 133 species.
menu_book
wikipedia NEUTRAL — Route 133 is a historic and heritage road of the Estrie and Montérégie regions in the province of Quebec, with north–south orientation and located on the eastern shore of the Richelieu River. Its nort…
https://en.wikipedia.org/wiki/Quebec_Route_133
menu_book
wikipedia NEUTRAL — STS-133 (ISS assembly flight ULF5) was the 133rd mission in NASA's Space Shuttle program; during the mission, Space Shuttle Discovery docked with the International Space Station. It was Discovery's 39…
https://en.wikipedia.org/wiki/STS-133
menu_book
wikipedia NEUTRAL — USS S-28 (SS-133) was an S-18-class submarine, also referred to as an S-1-class or "Holland"-type, of the United States Navy. She served in World War II, during which sank one Japanese ship. She was l…
https://en.wikipedia.org/wiki/USS_S-28
+ 3 more evidence sources
help
“Over 70% of the research was on birds, with insects, amphibians and reptiles making up just 10% of the data”
INSUFFICIENT EVIDENCE
No evidence was found after searching for this claim.
help
“Dr. Anne Charmantier, Research Director (DRCE) at CNRS, University of Montpellier, and a co-author of the research”
INSUFFICIENT EVIDENCE
No evidence was found after searching for this claim.
schedule
“Global meta-analysis reveals urban-associated behavioral differences among wild populations, Journal of Animal Ecology (2026). DOI: 10.1111/1365-2656.70269”
PENDING
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.