At this time of year, early mornings can provide a blast of birdsong, when it seems like there is a singing bird on every branch. But by analyzing Haikubox bioacoustic data, we can see that some birds choose different times to be heard.
The American Robin is a well-known early bird which may start singing before first light (don't worry, your Haikubox will capture those recordings so you can snooze a bit longer). We plotted 2025 Haikubox data in the heatmap above (times are UTC), which shows that its dawn chorus kicks off in March and winds down in June. These birds also participate in a dusk chorus in the early spring.
Haikubox data show that some birds offer their best vocal performances at other times of day, including Song Sparrows, shown in the heatmap below. Their welcome warble is a lovely companion to a woodsy daytime walk.
Other birds, like the American Goldfinch, are not exclusively spring singers. These birds are late nesters, waiting until seed-producing plants are abundant enough to feed their young. As the heatmap below shows, they can be heard into the early autumn.
And then there are favorite nocturnal birds, like the Barred Owl. Their nightime "who cooks for your" hoots are recorded by your Haikubox, and are ready for you to enjoy over your first cup of coffee.
