Furry instincts

When crickets stop chirping, it’s time to run: 10 animal early warnings

Image: Zoltan Fekeshazy

Long before radar and satellites, animals have relied on their sensory superpowers to detect natural disasters. From elephants hearing through the ground to ants reacting to tremors and storms in advance, many creatures exhibit behaviors that hint at impending doom—often hours or even days before it hits. Here's a list of 10 real ways animals are believed to detect and respond to natural disasters.

Image: paweldotio

Elephants can detect low-frequency seismic vibrations through their feet, known as infrasound. These sounds travel great distances through the ground, giving elephants an early warning system for earthquakes.

Field studies in Sri Lanka and Thailand have recorded elephants moving to higher ground hours before tsunamis and quakes.

Image: Chewy

Dogs often display signs of anxiety—pacing, whining, hiding—before storms or earthquakes. In some cases, they have even alerted owners to seizures or cardiac events.

Their acute sense of smell and hearing allows them to detect subtle changes in barometric pressure and even the scent of ozone that precedes a thunderstorm. In quake-prone areas, dogs have been reported barking frantically seconds before tremors strike.

Image: Alexandre Boucey

Sharks can detect shifts in barometric pressure, allowing them to dive deeper before hurricanes strike.

In 2001, tagged bonnethead sharks in Florida were observed diving rapidly in response to Hurricane Gabrielle’s approach. Their pressure-sensitive lateral lines function like an early-warning system for dangerous storms.

Image: Prince Patel

Ants have been observed to alter their foraging behavior and nest structure before earthquakes. Scientists believe they react to changes in soil gases and vibrations.

In addition to earthquakes, ants can also detect approaching storms. Changes in barometric pressure and humidity can cause ants to become more active or retreat deeper into their nests.

Image: Mohamed Fsili

As one would expect, birds are highly responsive to changes in air pressure. Many species change flight paths or stop migrating if a storm is coming.

In 2014, golden-winged warblers abruptly left Tennessee days before a deadly tornado outbreak, only returning after the threat passed. GPS trackers on some of the birds confirmed the sudden 900-mile round-trip escape.

Image: Geoff Brooks

Fish have been recorded jumping out of the water just before earthquakes, possibly reacting to pressure or specific chemical changes.

In Japan, koi and eels exhibited panic-like thrashing and leaping before the 2011 Tōhoku quake. Researchers suggest their specialized senses can detect subtle pressure waves or dissolved gas anomalies in water.

Image: Michelle Gordon

Rats often leave urban areas en masse before major flooding events. Sewer vibrations or scent cues may warn them of the incoming danger.

In India and Bangladesh, mass rat migration has historically preceded flash floods. Their survival relies on quickly identifying danger zones, and some believe their whiskers help detect water movement and even vibrations deep underground.

Image: Peter Fogden

Dolphins may be able to detect algal blooms (red tides) from miles away and often swim clear of affected areas.

Scientists believe their acute echolocation could help them sense chemical changes or detect developing dead zones. In Florida, dolphins have been observed avoiding regions impacted by Karenia brevis blooms long before any visible changes appear in the water.

Image: Erzsébet Vehofsics

Frogs may alter their calls ahead of seismic activity, responding to low-frequency vibrations.

Researchers in Japan recorded changes in frog croaking patterns in the days before the 2011 quake. The frogs emitted less frequent and lower-pitched calls, suggesting discomfort from environmental shifts.

Image: William Warby

Crickets often go silent ahead of disasters. This curious behavior may be linked to their sensitivity to ground vibrations and air pressure changes.

Studies in Indonesia noted decreased cricket chirping before tsunamis. The silence has been proposed as a natural indicator, potentially tied to shifts in humidity or ground tension.

Hospital secrets

What is a "Code Gray" and what you should know if you hear it at the E.R.

A trip to the emergency room can be stressful enough without hearing doctors and nurses speak a language that sounds like a secret code. One minute, someone is asking for medication "STAT," the next there’s a "Code Gray," and another patient is suddenly "NPO." What do those words really mean? Some are official medical terms, others are insider slang, but they all help hospital staff communicate quickly when every second counts. Here are 10 of those codes explained.

The E.R. can be hectic and unpredictable. Most patients are frightened or uncomfortable, but now and then someone becomes aggressive because of pain, confusion, mental illness, or the effects of alcohol or other substances. That’s when you can hear "Code Gray" announced over the speakers.

The code is used to summon security officers to help manage a violent or combative situation. While color codes vary from one hospital to another, Code Gray commonly signals that staff needs extra assistance to protect patients, visitors, and healthcare workers. Even if you know it now, most people in the waiting room never know what happened, and that’s exactly the point.

You have a scheduled surgery, you’re in your bed waiting to be taken to the surgery room, and you ask for a cup of coffee to make the wait lighter. The nurse will probably tell you you’re an NPO. You may think it’s serious, but it’s simply a procedure.

"NPO" is an abbreviation that comes from the Latin phrase Nil Per Os, which means "nothing by mouth." It tells patients they cannot eat, drink, or sometimes even take medication until doctors say it’s safe. The rule is most common before surgery or certain medical tests, when food or liquids could increase the risk of complications or alter the results. It may be frustrating, but it’s an important part of keeping patients safe.

You’ve probably been through the experience of visiting an emergency room, either to get checked or to visit a loved one. In that part of the hospital where everyone is rushing to save lives, you’ve probably heard a doctor asking for the R.C.P. cart or medication "STAT!" It sounds urgent, and that's because it is.

The expression comes from the Latin statim, which means "immediately" or "without delay." Hospitals have used Latin medical terms for centuries, but STAT is one of the few that remains part of everyday conversation. When a doctor says it, the request jumps to the top of the priority list. It doesn’t always refer to a life-or-death situation, but it does mean the medical team needs something done as quickly as possible.

Newborns are always a reason to celebrate at the hospital. Parents usually rest happily next to their child as they receive congratulations from close relatives. However, the hospital is always prepared to handle extremely rare emergencies under "code pink."

If you hear a "Code Pink," it usually means a baby or young child is suspected of being abducted from the hospital. Within seconds, security officers respond, exits may be monitored or blocked, and staff begins following carefully rehearsed procedures. Although different hospitals sometimes use different color codes, Code Pink has become widely recognized across North America as one of the most serious alerts a hospital can issue.

If you’ve ever spent a few days in the hospital, you’ve probably noticed that some patients are walking up and down the halls, while others need help just getting out of bed. When a nurse refers to someone as a "walkie-talkie," it’s actually good news.

This informal expression refers to patients who can walk on their own, use the bathroom without assistance, and handle most basic tasks independently. It’s not an official medical term, of course, but it’s commonly used among healthcare workers because it quickly tells the next shift that the patient requires less hands-on care than many others.

As nurses change shifts, you’ll often hear them give a quick report about each patient. One person may only need medication, while another is described as a "total."

The term is short for a patient who requires total care. They may need help eating, bathing, getting dressed, turning in bed, or moving from one place to another. Although the expression sounds impersonal, it’s simply a practical way for caregivers to communicate how much assistance someone needs.

Most people hear "frequent flyer" and think of an airline reward program. And that’s correct, but in an emergency room, the phrase has a very different meaning.

A frequent flyer is an informal nickname for patients who repeatedly return to the hospital, often due to chronic illness, recurring medical conditions, or other ongoing health issues. Behind the light-hearted nickname is often a difficult reality. Many of these patients are simply dealing with medical problems that require regular emergency care, and the expression is just a way to make the experience a bit lighter among the familiar faces of doctors and nurses.

Not all codes are for patients. The next time you’re in a hospital, look closely at what the nurse is pushing from room to room. It may look like a small rolling desk with a computer on top. Staff often call it a "WOW," short for "workstation on wheels."

As hospitals switched from paper charts to electronic medical records, these mobile computers became essential. Nurses use them to review test results, scan medications, update patient charts, and check doctors’ orders without leaving the bedside. The name sounds funny, but the technology helps caregivers spend more time with patients instead of walking back and forth to a nursing station.

After getting a shot or having blood drawn, most patients never think about where the used needle ends up. It certainly doesn't go into an ordinary trash can.

Hospitals place needles, scalpels, and other sharp medical instruments into special containers designed to prevent accidental injuries. These sturdy, puncture-resistant boxes are sealed when full and safely disposed of in accordance with strict health regulations. This not only protects nurses, but it also protects cleaning crews, waste handlers, and even the public from dangerous needle sticks. It’s one of the most important safety measures in every hospital, even though most patients never notice it.

If you’ve ever watched a medical drama, you've probably seen a patient become so agitated that several staff members rush into the room. In situations like that, a doctor or nurse may ask for a "B-52." But the name has nothing to do with numbers themselves; it actually comes from a medicine.

B-52 is hospital slang for a fast-acting injection used to calm down patients who are severely combative or at risk of harming themselves or others. The nickname comes from a commonly used combination of medications that usually include diphenhydramine, haloperidol, and lorazepam. It’s strictly reserved for when other methods of calming the patient haven’t worked.