Why Do Cats Chirp at Birds? Is This Normal?

There are several reasons why cats chirp at birds and other animals, according to experts. 

Many cat behaviors are what Mieshelle Nagelschneider, certified cat behaviorist and founder of The Cat Behavior Clinic, in Seattle, Washington, calls Darwinian-evolved, “survival of the fittest” behaviors—and this trilling meow sound they make may actually help them capture their prey. 

“It may be a way of mimicking the bird to entice it to come closer,” says Nagelschneider. 

This behavior is also seen in large, wild cats. Our house cats’ much larger and wilder counterparts, like cheetahs and mountain lions, are known to chirp or chatter in nature, says Ingrid Johnson, a certified cat behavior consultant and the owner of Fundamentally Feline, in Atlanta, Georgia. (See what we mean here.) 

Another reason why your cat may chirp or chatter at animals outside? Sheer excitement—of a potential snack! 

“Cats are really excited when they see a bird or squirrel, and they want to get their mitts on it,” says Marci Koski, a certified feline behavior and training consultant and owner of Feline Behavior Solutions in the Pacific Northwest. “That excited energy can result in this chattering sound.” 

Nagelschneider likens it to your mouth watering when looking at a delicious dessert before you take a bite. “The teeth chattering together is the closest the cat can get to having the prey in its mouth and quickly biting down on it.” 

Yikes! Sometimes we forget our cats are natural born predators (we say as we sprinkle catnip around their luxury cat beds like rose petals). 

When your cat chirps at birds or other prey, Johnson says there’s also a chance it could be an involuntary reflex that happens secondary to excitement. 

“They’re so stoked to see that bird outside their window, and it’s their way to exercise that excitement so they don’t scare the prey away or rush after it prematurely,” she explains. 

If you think your indoor cat is chirping out of frustration or anxiety because they can’t catch their prey outside, Nagelschneider says not to worry.  

“An important thing I tell [cat parents] to remember is that out in nature cats do not catch their prey all the time. Not even close,” she says. 

In fact, the most exciting part of the hunt for cats is when their prey hides and it becomes a more challenging experience.  

“This activates what is called their ‘seeking circuit,’ which is in the reward circuitry of the brain and the best feeling for cats,” Nagelschneider says. 

So even if your domestic cat is chirping at squirrels or birds outside, it may not be out of frustration—but rather enthusiasm and entertainment.  

“They’re watching kitty cat TV through the window—and they’re pretty engaged with what they’re watching,” Johnson says. 

If your cat gets excited about birds and squirrels outside windows, this can initiate something called their “prey sequence,” or a series of behaviors that cats perform when they hunt. 

The first step of this prey sequence, Koski says, is staring at prey animals and getting excited (this is where your cat’s chirping or chattering might come in).  

The second step is stalking or chasing, then comes pouncing or grabbing, and lastly comes the killing bite. 

Though you may think of your house cat as an adorable fluffball who loves to take long naps and bask in the sun for hours at a time, Koski says all cats are “wild carnivorous beasts, so it’s really important to give them an outlet for those instinctual habits.”  

One way to do that is to invest in some interactive toys, like a wand they can chase. (We like this Frisco teaser wand!)  

OK, get ready to cringe. Speaking of the killing bite, Johnson says that the chirping vocalizations cats make essentially “mimic the action of the jaw or the motion of what [cats] would do when they sever the spine and snap the neck of their prey.” 

As creepy or unsettling as that may be, it’s totally normal. Johnson explains that this type of mouth movement is controlled by your cat’s motor system and is actually an involuntary reflex. 

“Their jaws move so quickly like that because they’re enthusiastic about catching the kill and killing it—and how they do that is by snapping their necks. [This chirping] mimics the motion of the kill portion of the predatory sequence,” she adds. 

The good news? All three cat experts agree that cats chirping or chattering at their prey is completely normal and nothing to worry about. In fact, they all believe you should encourage your cat’s chirping noises! (Learn how to do that in the section below.) 

“There’s nothing to worry about,” Johnson assures. “This is totally normal and adorable—give them a chance to be enriched and engaged.” 

So even if your cat is making strange noises while staring at birds or squirrels outside, you don’t need to stop or redirect the behavior.  

“Trying to stop a cat from this behavior would be like trying to stop a bird from singing or building a nest. It’s completely harmless and an evolved genetic trait in cats,” says Nagelschneider. 

Furthermore, removing your cat’s outlet for performing their natural prey sequence can cause them to become stressed. Koski says it can cause behavioral issues such as “pent-up energy, frustration, or aggression towards people or animals in the household.” 

If you want to encourage your cat’s prey sequence at home (which all three experts recommend you do!), there are several things you can try. 

For starters, Johnson recommends that cat parents “put cat condos near big, open windows; put up squirrel feeders or bird feeders; and let your cat have the opportunity to watch TV!”

You could even get a window-mounted perch for your cat, like the Frisco Plush Cat Window Perch, to give them a front-row seat for bird watching. 

“All cats should have several interactive play sessions with cat toys a day—especially prior to a meal,” says Johnson. “Playing with your cat before you feed them is ideal because it mimics that predatory sequence of hunt, stalk, catch, kill, eat.” 

Engage their minds with food puzzles, like this one from OurPets, or other treat-dispensing toys, like the Catit Treat Ball.  

These types of products make your cat work for their food or treats like they would in the wild. Though they’re not exactly hunting prey out in the savanna, it will still simulate the experience and give them a source of entertainment. 

Providing different chaser toys or wand toys—especially wands with changeable clips, like the Pet Fit for Life 5-Piece Worm Wand Cat Toy—can help keep your cat stimulated. 

“Variety is the spice of life for cats,” Koski says. “They don’t hunt or get excited by just one thing. If you eat pizza for two weeks straight, you’ll never want to eat pizza again. You’ll want to rotate those lures to keep it fresh and exciting.” 

Cat chirping can occur when your cat is excited, entertained, or ready to hunt. It’s not only a normal behavior, but it’s also a good sign that you have an engaged and happy kitty!