Key Points
- Rattlesnakesโ territory extends through a huge portion of the Americas. As such, local climates and seasons determine their annual cycles.
- In habitats where the temperatures drop low enough, these snakes emerge from brumation in early spring and stay active until the beginning of fall.
- Rattlesnakes tend to be most active at sunrise and sunset and, if the weather is right, they can also be out at night or in the middle of the day in full sunlight.
Rattlesnakes, also called rattlers, are responsible for more snakebites in North America than any other type of snake. There are over 50 species of rattlesnake, including the timber rattlesnake, eastern diamondback, western diamondback, Mojave rattlesnake, and prairie rattlesnake. Rattlers come out to eat, sun themselves, and find mates. They are members of the pit viper family of snakesโso named for the pits near their eyes. They rely on the heat of the sun to keep their bodies warm.
Like most pit vipers, rattlesnakes have relatively poor vision that relies mainly on movement. But, they have a secret weapon that allows them โseeโ no matter what time of day or night it is: heat vision. Thatโs right! Those little pits on their heads actually allow them to sense heat and strike with deadly accuracy.
With such a formidable array of senses, and deadly, venom-injecting fangs, itโs important to know just when rattlesnakes come out. Here, weโll learn a little more about recognizing rattlers and where to watch for them. Then, weโll explore the times of the year to avoid rattlers, as well as whether or not you should watch out for them at night. After, weโll go over the steps you should take when and if you ever encounter a rattler.
What Do Rattlesnakes Look Like?

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Rattlesnakes range from under two feet long to over eight feet long, with the eastern diamondback being the largest species. Most species have a distinct diamond pattern of alternating light and dark scales running down their body. Bullsnakes have a similar appearance, but they lack a few of the key features that make rattlesnakes unique.ย
Unlike bullsnakes, rattlesnakes have spade-shaped heads that are very wide at the base of the skull. They also, of course, have rattles. The one exception to this is in baby rattlesnakes. Baby rattlers are born with only one rattle segment and canโt rattle until they grow at least three segments.
Rattlers have one more distinctive feature: their fangs. Rattlesnakes come out to hunt small mammals, birds, and reptiles. When they strike, their fangs open like switchblade knivesโthey can grow up to half an inch in length. Bullsnakes and other nonvenomous snakes in North America donโt have such impressive fangs or even any fangs at all.

Where Do They Live?
It may seem counterintuitive to those of us who have always pictured rattlesnakes in the desert southwest, but rattlers actually live all over North America, Central America, and South America. They can be found as far north as southern Canada and as far south as Argentina. Like all snakes, rattlesnakes come out to warm their bodies in the sun, no matter where they are.
Rattlesnakes are highly adaptable to different climates and regions; they can be found in deserts, forests, scrublands, and even swamps. So, just because youโre hiking in a lush pine forest doesnโt mean you shouldnโt watch out for rattlers.

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Lifespan
Rattlesnakes are a species of venomous snake found all across the Americas. Their lifespan varies greatly depending on the species, but generally speaking, rattlesnakes can live for up to 20 years in the wild, with some individuals living even longer.
In captivity, they may live well into their 30s or 40s due to better care and conditions. Rattlesnakes tend to reproduce once every two years, and females usually give birth to between 2-12 young at a time. The babies are born with functioning fangs and venom glands so that they can protect themselves from predators right away.

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Threats
Rattlesnakes are considered to be of โLeast Concernโ on the International Union for Conservation of Nature (IUCN) Red List, meaning that they are not currently facing extinction. However, their populations in some areas have declined due to habitat destruction and fragmentation caused by human activities such as urbanization, agricultural development, and deforestation. Additionally, changes in land use patterns can lead to increased contact between rattlesnakes and humans, which can result in more snake bites or the intentional killing of snakes out of fear.
Climate change is also having an impact on rattlesnake habitats since it causes extreme weather events such as drought or flooding, which can reduce available food resources or create unsuitable conditions for these cold-blooded animals. Finally, illegal poaching by collectors continues to be a threat that needs to be addressed if we want future generations to continue enjoying the presence of rattlesnakes in our ecosystems.

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What Months Do Rattlesnakes Come Out?
The yearly cycle of rattlesnakes is extremely dependent on the local climate. But, most spend their winters brumating in dens with tens to hundreds of other snakes. Brumation is similar to hibernation; during brumation, their metabolism slows down, and they do very little other than sleep away the cold months.ย
Rattlesnakes come out in early spring and stay active until early fall. This may change depending on the weatherโthe hottest months of the year may bring about another period of reduced activity for them, called estivation. Rattlers like it warm, but not too warm, so theyโre most likely to be active during the spring and fallโthe same times of year that humans like to spend outdoors.

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Do Rattlesnakes Come Out at Night?ย ย
Unlike other animals, who only come out in the day or only at night, rattlesnakes come out at all times of the day or night. They are diurnal, nocturnal, and crepuscular, depending on weather, wildfires, temperature, and prey availability.
Rattlesnakes come out both at sunrise and sunset, making them crepuscular. Often, these are their most active times, but they also come out in the full sun and full light. Creatures that are active in the day are known as diurnal, while nighttime animalsโlike owlsโare nocturnal. Rattlesnakes, however, are both. They are extremely adaptable and will stay awake at whatever time suits them best.

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The Best Times of the Year to Avoid Rattlesnakes
If youโre looking to avoid rattlers, then you need to know when rattlesnakes come out and when theyโre most active. Winter is the least active time of the year for rattlers, though most people donโt hike in the winter months. Rattlesnakes also slow down at the height of summer, when the heat is at its worst. But, again, this is also the time of the year that theyโre most active at night, sunrise, and sunset.
Unfortunately for avid outdoors people, the best times of the year for hiking and camping are also the best times of the year for rattlesnakes to come out. So, if you donโt want to camp in the frigid winter months, your best bet is to go ahead with your outdoor activities, but only after learning a little bit about rattlers. And you should know the dos and donโts of hiking or camping in rattlesnake country.

How to Avoid Encounters
The first step is obviously to know when you are in potential rattlesnake habitats. When youโre walking, camping, or hiking in these areas, there are a few things you can do.
Keep a clear sight of your path and try to step in open sections of ground that arenโt obstructed by brush. Use a walking stick to occasionally disturb the brush around your path and scare off any unwanted wildlife.
Wear boots and/or that cover your ankles, and wear gloves when picking up rocks and other objects off the ground. Keep your hands and feet away from crevices, ledges, and other places snakes may hide in/under.

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What to Do If You See a Rattler
At heart, rattlesnakes donโt want to hurt us. In fact, they see us as threats, not as dinner. Because of this, rattlesnakes donโt hunt people, and theyโre typically not aggressive. They would rather stay hidden and not risk their lives in a fight with a human. But, sometimes, things happen, and humans and rattlesnakes come together.
If this happens to you, the first thing to remember is that rattlers are dangerous wild animals and should be admired from a distance. Do not approach or make any attempt to handle rattlesnakes, no matter how interesting they may be. Move away slowly from them, take pictures from a safe distance, and leave them to hunt rodents another day.

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Rattlesnake versus Bullsnake
The two species of snake, the rattlesnake, and the bullsnake, are both members of the pit viper family. The most obvious difference between them is their size. A full-grown rattlesnake averages around three feet long compared to six or more for an adult bullsnake. Another major distinction between these two snakes is in their coloring. Rattlesnakes have distinctive markings, which often consist of black, brown, yellow, and white stripes running along their body and tail. Bullsnakes tend to be plainer, with light tan or gray bodies covered in dark blotches.
In terms of temperament, Rattlesnakes are much shyer than Bullsnakes, so they will usually retreat if threatened, whereas Bullsnakes may instead become aggressive as a defensive mechanism. As far as diet goes, Rattlesnakes primarily feed on small mammals such as rodents, while Bullsnakes eat anything they can catch, including lizards and frogs.
Up Nextโฆ
Itโs always smart to stay informed about the behaviors of potentially dangerous animals when youโre spending time in their territory. Read up some more on the infamous rattlesnake.
- Rattlesnake Fencing: Does it Actually Workโ If you live somewhere with rattlesnakes, youโll want to know how to keep them away from your territory.
- 11 Animals that Hunt Rattlesnakesโ For the most part people and rattlesnakes prefer to keep their distance from each otherโฆ so who are the bold creatures that actually go after rattlesnakes?
- 5 Animals Immune to Rattlesnake Venomโ Must be nice to shake off a rattlesnake bite like nothing!
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