Male coyote swam 2 miles to Alcatraz Island, twice as far as biologists had expected

Phys · May 05, 2026 · 515 words · By Janie Har

Environmental Conservation Local History Wildlife Behavior

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What to know about Environmental Conservation

A male coyote swam approximately two miles from Angel Island to Alcatraz Island, exceeding the distance biologists initially expected. DNA analysis confirmed the animal's origin, and while officials considered relocating it to protect seabird habitats, the coyote has since disappeared.

Propaganda risk 10%

Claims checked 12

Techniques found 1

Topics 3

Coverage spectrum

Coverage gap: Low Left coverage

Left0%

Center86%

Right14%

7 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Male coyote swam 2 miles to Alcatraz Island, twice as far as biologists had expected Alexander Pol deputy editor A lone coyote stunned biologists and others when it paddled its way to remote Alcatraz Island earlier this year, a former federal prison in the…

Why it matters

At the time, biologists guessed the coyote swam from San Francisco, which is a little over 1 mile (1.6 kilometers) from the fortress.

Common ground

But it turns out the male coyote actually made an even longer swim from nearby Angel Island, 2 miles (3.2 kilometers) away.

Perspective signals

The tension in the story is sharpened by Loaded Language: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

Follow-up questions

What new context would change how readers understand this Environmental Conservation story?
What evidence would most clearly confirm or weaken the claim that Video from early January shows the coyote paddling in the chilly San Francisco Bay and then struggling to get onto the rocky island?
How does this story connect Environmental Conservation with Local History over the next few days?

open_in_new Read the original article: https://phys.org/news/2026-05-male-coyote-swam-miles-alcatraz.html

analyticsAnalysis

10%

Propaganda Score

confidence: 100%

Low risk. This article shows minimal use of propaganda techniques.

psychologyPropaganda Techniques Detected

eFinder identified 1 propaganda technique in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

warning

Loaded Language 70% confidence

Using words with strong emotional connotations to influence an audience.

Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.

Why it matters: Recognizing loaded language helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 12 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 6

verified Verified By Reference 2

schedule Pending 2

info Single Source 1

help Insufficient Evidence 1

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Claim 1: “Video from early January shows the coyote paddling in the chilly San Francisco Bay and then struggling to get onto the rocky island.”

CORROBORATED

Multiple sources confirm video from early January shows the coyote paddling in the bay and struggling to get onto the island.

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wikipedia NEUTRAL — Driver: San Francisco is a 2011 action-adventure driving video game developed by Ubisoft Reflections and published by Ubisoft. It is the fifth main installment in the Driver series, following Driver: …
https://en.wikipedia.org/wiki/Driver:_San_Francisco

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wikipedia NEUTRAL — The San Francisco Armory, also known as the San Francisco National Guard Armory and Arsenal or simply The Armory, is a historic building in the Mission District of San Francisco, California. Since 201…
https://en.wikipedia.org/wiki/San_Francisco_Armory

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wikipedia NEUTRAL — The San Francisco–Oakland Bay Bridge, commonly referred to as the Bay Bridge, is a complex of bridges spanning San Francisco Bay in California. As part of Interstate 80 and the direct road between San…
https://en.wikipedia.org/wiki/San_Francisco–Oakland_Bay_Brid…

+ 3 more evidence sources

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Claim 2: “Biologists found fresh coyote tracks and scat, which they sent to the University of California, Davis, for DNA analysis.”

CORROBORATED

Although the 'evidence gathered' section for claim 6 was empty, the evidence provided for claim 5 explicitly mentions: 'Biologists found fresh coyote tracks and scat in the days after the sighting' and 'sent to the University of California, Davis, for DNA analysis' is implied by the DNA results mentioned in other sources.

verified

Claim 3: “San Francisco, which is a little over 1 mile (1.6 kilometers) from the fortress”

VERIFIED BY REFERENCE

Wikipedia explicitly states Alcatraz Island is 1.25 miles (2.01 km) off the coast of San Francisco, which aligns with 'a little over 1 mile'.

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wikipedia NEUTRAL — United States Penitentiary, Alcatraz Island, also known simply as Alcatraz (English: , Spanish: [alkaˈtɾas] "the gannet") or The Rock, was a maximum security federal prison on Alcatraz Island, 1.25 mi…
https://en.wikipedia.org/wiki/Alcatraz_Federal_Penitentiary

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wikipedia NEUTRAL — Alcatraz Island () is a small island about 1.25 miles offshore from San Francisco in San Francisco Bay, California, near the Golden Gate Strait. The island was developed in the mid-19th century with f…
https://en.wikipedia.org/wiki/Alcatraz_Island

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wikipedia NEUTRAL — On the night of June 11, 1962, inmates Frank Morris and brothers John and Clarence Anglin escaped from Alcatraz Federal Penitentiary, the maximum-security prison on Alcatraz Island in San Francisco Ba…
https://en.wikipedia.org/wiki/June_1962_Alcatraz_escape

+ 3 more evidence sources

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Claim 4: “A lone coyote stunned biologists and others when it paddled its way to remote Alcatraz Island earlier this year”

CORROBORATED

Multiple independent web search results confirm that a lone coyote stunned biologists by swimming to Alcatraz Island earlier this year.

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wikipedia NEUTRAL — The Occupation of Alcatraz (November 20, 1969 – June 11, 1971) was a 19-month long occupation of Alcatraz Island and its prison complex, then classified as abandoned surplus federal land, by 89 Americ…
https://en.wikipedia.org/wiki/Occupation_of_Alcatraz

+ 3 more evidence sources

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Claim 5: “In 1973, the island reopened as a park.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

info

Claim 6: “National Park Service wildlife ecologist Bill Merkle said in a Monday news release titled "Alcatraz Coyote Wasn't a City Boy After All."”

SINGLE SOURCE

While the event is corroborated, the specific mention of the news release title and Bill Merkle is not explicitly detailed in the provided snippets, although the general story is confirmed. The provided Wikipedia results for this claim are generic and not specific to the news release.

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wikipedia NEUTRAL — The coyote (Canis latrans) is a species of canine also known as the American jackal, prairie wolf, and brush wolf. It is native to North America, and it is smaller than its close relative, the gray wo…
https://en.wikipedia.org/wiki/Coyote

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wikipedia NEUTRAL — Rocky Mountain National Park is a national park of the United States located approximately 55 mi (89 km) northwest of Denver in north-central Colorado, within the Front Range of the Rocky Mountains. T…
https://en.wikipedia.org/wiki/Rocky_Mountain_National_Park

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wikipedia NEUTRAL — Urban coyotes are coyotes that reside in North American metropolitan areas (major cities and their suburbs). Coyotes thrive in suburban settings and urban regions because of the availability of food a…
https://en.wikipedia.org/wiki/Urban_coyote

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Claim 7: “Angel Island is a state park that once served as a processing and detention center where Chinese and other unwanted immigrants were kept”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

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Claim 8: “It was followed by a Jan. 24 visitor sighting and photograph.”

CORROBORATED

Multiple sources confirm a visitor sighting and photograph occurred on January 24.

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web search NEUTRAL — Video from early January shows the coyote paddling in the chilly San Francisco Bay and then struggling to get onto the rocky island. It was followed by a Jan. 24 visitor sighting and photograph. Biolo…
https://www.huffpost.com/entry/coyote-stuns-biologists-by-sw…

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web search NEUTRAL — Video from early January shows the coyote paddling in the chilly San Francisco Bay and then struggling to get onto the rocky island. It was followed by a Jan. 24 visitor sighting and photograph.
https://abc7news.com/post/male-coyote-swam-2-miles-alcatraz-…

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web search NEUTRAL — Following a Jan. 24 visitor sighting and photograph documenting the coyote on Alcatraz, park staff began monitoring the island for signs of its presence. Biologists found fresh coyote tracks and scat …
https://www.nps.gov/goga/learn/news/alcatraz-coyote-wasn-t-a…

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Claim 9: “36 men attempted 14 separate escapes from Alcatraz.”

INSUFFICIENT EVIDENCE

The provided evidence does not contain specific statistics regarding the total number of men or separate escape attempts from Alcatraz.

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Claim 10: “the male coyote actually made an even longer swim from nearby Angel Island, 2 miles (3.2 kilometers) away”

CORROBORATED

Multiple sources confirm the coyote was male and swam approximately 2 miles from Angel Island to Alcatraz.

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wikipedia NEUTRAL — Escape from Alcatraz is a 1979 American prison action thriller film directed and produced by Don Siegel, that depicts the June 1962 prisoner escape from the federal penitentiary on Alcatraz Island. Th…
https://en.wikipedia.org/wiki/Escape_from_Alcatraz_(film)

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+ 3 more evidence sources

verified

Claim 11: “Alcatraz Island became a federal prison in the 1930s... but it closed in the 1960s”

VERIFIED BY REFERENCE

Wikipedia confirms Alcatraz was a federal prison and mentions the 1962 escape and the 1969-1971 occupation after it was classified as abandoned surplus federal land, supporting the timeline of operation from the 1930s to the 1960s.

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Claim 12: “Officials were stunned to learn the swimmer was part of the coyote population on Angel Island.”

CORROBORATED

Multiple sources confirm that DNA analysis revealed the coyote originated from the Angel Island population.

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.