whistlers

"The loud construction outside caused many disturbances during the online class, making it hard to hear the teacher. "

"My grandma enjoys birdwatching in her backyard, where she can see many different types of birds. "

"The koala munched happily on the eucalyptus leaves. "

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The violinist was a master of her instrument."

"The school district saw a surge in enrollment regionally, but not nationally. "

"Never whistle at a funeral."

"The atmospheric pressure in the classroom was tense after the surprise announcement. "

"The robin in my backyard is a passerine, easily identified by its perching feet and melodious song. "

"Her distinctive laugh, a high-pitched giggle, could be heard across the entire playground. "

"Her diligent practicing on the piano led to a stunning performance at the recital. "

"The cell phone emits electromagnetic waves that allow us to communicate. "