March Birding Forecast

Author name

By Alex Harper



On March 1, Southern Nevada receives about eleven hours and twenty-six minutes of direct daylight. This is about an hour more of total daylight compared to that on February 1, and about an hour and forty minutes more than on January 1. On the last day of March, we receive about twelve and a half hours of daylight. The increased daylight in the northern hemisphere brings increased warmth. The additional light and heat give plants energy to photosynthesize and kickstarts the processes of putting out new leaves and flowers. Insect activity follows and ramps up.


In sync with the progressions of the seasons are billions of waterfowl, shorebirds, raptors, hummingbirds, and songbirds. Across their wintering grounds in South and Central America, Mexico, or the Sonoran Desert, these birds are fattening up and saving their energy for long, challenging journeys. Like the plants and insects, these birds register the increasing sunlight; cascades of hormonal changes prepare them for a seasonal movement that we call migration. Of these billions of birds, many millions will pass though Nevada’s skies this spring.


March offers a preview for what’s in store for April and May. Although March may have days that feel like spring, there are days that potentially can be reclaimed by winter weather. This means that for many songbirds, it may be too energetically taxing and risky flying northwards into our region in March. It could even be fatal if an intense cold snap occurred. A few species of land birds do manage to successfully navigate the temperamental month of March, seemingly adapted to cope with the unpredictability. 


These birds include Yellow-headed Blackbirds and cowbirds, which are sometimes coming from marshes and agricultural areas of Southern Arizona or northern Mexico, are some of the first to arrive. You may find or hear these birds at familiar parks, especially any with stands of wetland vegetation or large lawns. Their relative, Hooded Orioles, come back by late March, preferring to be closer to trees such as palms.


Along the Colorado River or Clark County Wetlands Park, the Lucy’s Warbler begins to trickle in. These small, gray warblers seek out stands of mesquite tress, joining the assemblage of overwintering Yellow-rumped and Orange-crowned Warblers. The Lucy’s Warbler winters as close by as the Mexican state of Sinaloa. This means that the distance that they needed to traverse to get to Southern Nevada is far less than that of comparatively sized warblers wintering deeper into Mexico and helps explain why we see these warblers arrive well before the others. It’s one of the only warblers to breed in tree cavities, and they prefer mesquite groves and wooded wetlands for nesting habitat.


Other birds on their way through Nevada in March are swallows. These strong flyers are diurnal migrants, and unlike most other songbirds, they have the advantage of being able to hunt flying insects as they migrate northbound. Tree, Violet-green, Barn, Northern Rough-winged and Cliff Swallows may be seen cruising low and purposefully northward through open desert or stopping to feed and drink anywhere with surface water. Some of the Northern Rough-winged or Cliff Swallows may end their spring journey in Las Vegas or Henderson, as some create nests under bridges at locations like Arroyo-Grande Park or Pittman Wash.


Other birds are departing our region. The wintering duck numbers begin to thin out at the popular birding sites in the region. Geese and ducks are well-adapted to finding food in winter but often driven by accessible bodies of water for roosting or foraging. With lakes and ponds thawing out to the north, they will largely begin departing the region for the wetlands of the Great Basin and prairies of the west, the spruce forests of Canada or Alaska, or even the tundra of the Arctic.


Close to your home, you may be observing flurries of breeding behavior from resident doves, hummingbirds, and songbirds. These birds that often live their entire lifecycles in the same region breed well before some birds have begun migratory journeys that can be hundreds or thousands of miles in duration. These are the Anna’s Hummingbirds, Verdins, and Northern Mockingbirds. It’s possible that by late March you may see robins or local birds feeding young in nests.


Like every year, month, or week, no day is the same when observing birds. Each species has its own unique life history. As you get outside in March, you’ll be able to observe behavior changes amongst species and individuals. Tune in to these subtle changes and watch for the trickle of incoming spring migrants. And come April, the dam breaks, and the flycatchers, vireos, warblers, orioles and tanagers begin to pour in.

 

RECENT ARTICLES

By Alex Harper October 31, 2025
When the days grow shorter, the nights cooler, and winds begin to turn south, many birds begin to change their behaviors. The breeding season has come and gone. Some species spend their lives close to home, perfectly adapted to their habitats through all seasons. But for most North American songbirds, migration is a necessary annual act of survival in the seasonal pursuit of food, water, and safety. These include flycatchers, vireos, thrushes, sparrows, blackbirds, warblers, tanagers, grosbeaks, and buntings. As insects vanish and leaves fall across northern regions, many birds push south, traversing mountains, valleys, and deserts in search of suitable habitat. Many of these birds are intending to make their way to the warmer climates of Mexico and more tropical areas for the colder months. In the arid expanse of the Mojave Desert, safe stopover sites are few and far between. Migrants that are not desert specialists often must locate oases, which are small pockets of water, shade, and food, to rest and refuel. Some are natural: mountain springs and creeks, valley wetlands, or canyons. Others are entirely human-made: parks, cemeteries, and towns where irrigation and ornamental trees create relatively lush islands in a sea of desert. These green patches, although artificial, can mean the difference between exhaustion and success for a traveling flycatcher or warbler. One such refuge sits right on the California-Nevada border along I-15. This is the “town” of Primm. To most travelers between Los Angeles and Las Vegas, it’s another brief stop for gas and food. A defunct roller coaster and closed shopping outlet give the impression that Primm’s prime is behind us. But for birders, it’s a birding hotspot. Primm’s irrigated lawns and runoff from water sources draw birds from miles around. Its small size makes it easy to cover, and its isolation makes it stand out. It’s an island of green surrounded by dry lake beds and sparse vegetation. Primm is a classic “migrant trap,” where the color green and promise of water concentrates birds in one small place. Though songbirds navigate with remarkable precision by reading the stars, reading the Earth’s magnetic fields, and using landmarks - they do sometimes go astray. Young or disoriented individuals may travel the right distance but in the wrong direction, bringing eastern or Great Plains birds into western deserts. For birders, these navigational errors are the source of exciting discoveries, especially in the Fall. When one rare bird is found, more often follow. This is the “Patagonia Picnic Table Effect,” named after a famous site in Patagonia, Arizona, where a single unusual sighting decades ago triggered a rush of birders who went on to discover even more rarities. Primm functions much the same way: one exciting report draws others to look, and the increased attention yields more discoveries. The town’s lawns and patches of trees may not be appealing, but birders affectionately call it the “Primm Forest Preserve,” a tongue-in-cheek tribute made by biologists working in the region in the mid-2010s. The Fall of 2025 was especially exciting, with Baltimore Oriole, multiple Painted Buntings, a Blackburnian Warbler, Yellow-throated Warbler, and more showing up in a short amount of time. As birder and biologist Michael McCloy shared, “This oasis contains some of the only real trees and water for miles, acting as a magnet for any migrating songbirds in need of rest and refueling.” During his near-daily visits this September, he witnessed moments of pure wonder: “One day I turned around and there was a Lark Bunting and a Dickcissel at the same roadside puddle. Another day, a Marsh Wren perched twenty feet up in a tree. And when a Black-throated Blue Warbler showed up, it came within three feet of me. I wondered if it was going to land on my arm.” For Clayton Peoples, who visits regularly from Reno, Primm has become a staple of southern Nevada birding. “It’s one of my go-to places,” he said. “I used to stay at Buffalo Bill’s just to be right there at sunrise.” Clayton recalls finding a Nelson’s Sparrow with Dave Anderson, a Dickcissel while searching for a Painted Bunting, and most recently a hatch-year female Black-throated Blue Warbler. Many of these birds are considered “ review list ” for Nevada. He shares updates through the WhatsApp groups and Facebook, helping others join in on sharing are bird sightings. For birders from across the state, Primm has become an unlikely meeting ground for the birding community. On a population scale, migrant traps like Primm may seem insignificant. But for individual birds, these patches of green can mean survival - a brief chance to rest, feed, and rebuild strength before continuing south. Every visit is a gamble with the possibility of reward, especially in April-early June and August to late October when most songbirds are migrating. Whether you’re in Primm, Corn Creek, Indian Springs, or a patch of trees in your neighborhood park, have a look and be open to the idea of finding something you wouldn’t expect. You never know what might drop in. 
October 30, 2025
By Alex Harper By November, most of the wintering songbirds have settled into their wintering territories for the winter months. In and around our neighborhoods and small parks, Northern Flickers, Ruby crowned Kinglets, Yellow-rumped Warblers and White-crowned Sparrows have become part of the urban and suburban winter makeup. Brewer’s Blackbirds arrive in force, joining grackles and hanging around parking lots and busy parks. Our Empidonax flycatchers, vireos, most species of wood-warblers, orioles, grosbeaks and tanagers have long-departed for the warmer Sonoran Desert, woodlands in Mexico, or tropical areas of Central and South America. We won’t begin seeing these birds again until March, April, and May. At our wetlands and artificial ponds and lakes, waterfowl diversity and numbers increase through the month. Redheads, Ring-necked Ducks, Buffleheads, and dabbling ducks stream in from waterbodies from the north. One can observe this movement from the bank of Clark County Wetlands Park, where birds follow the Wash as they explore new foraging areas. Parks like Sunset Park and Craig Ranch Park can be great places to observe some of the ducks at close range. At Lake Mead, check 33-Hole for loons and wintering gulls, and Boulder Beach for Greater Scaup and unusual diving ducks like scoters. Scoters feed on mollusks and take advantage of the invasive Quagga Mussel population at some parts of the lake. Geese also wander in the valley. Along with Canada Geese, search for Greater White-fronted Geese and Snow Geese at parks and athletic fields. Small numbers of Ross’s and Cackling Geese mingle at these sites with the larger geese. By the end of the month, it is not unusual for Tundra Swans to make brief visits to our watercourses. At our more well-vegetated parks, keep an eye and ear out for other wintering species. Northern Harriers frequent the bird preserve and the Wash. Hermit Thrushes and Spotted Towhees can be found anywhere with enough understory, though are a bit too shy for most urban parks. Some cultivated plants such as California Fan Palms and Russian Olives begin to produce fruit, which can lure in flickers, robins, waxwings, starlings, mockingbirds and more. Keep an eye out in your neighborhood for such plants. November is a great month for those looking for unusual and infrequent bird species. Corn Creek at Desert National Wildlife Refuge, Floyd Lamb, and any of our large parks can lure in species such as Eastern Phoebe, Pacific Wren, Varied Thrush, Gray Catbird, American Tree Sparrow, Swamp Sparrow, Harris’s Sparrows, Golden-crowned Sparrow, and Lapland Longspur all could show up in the Las Vegas area this November. These are all hardy species that can overwinter in the region and endure the occasional freezes. .
September 27, 2025
By Alex Harper October is a month of intense change for bird diversity in southern Nevada. The experience that one might have at the very beginning of the month is likely going to be very different from the end. Throughout the month, transiting birds arrive with gradually intensifying cold fronts coming from the north. These colder temperatures begin to suppress insect activity, forcing most insect-eating birds to move to lower latitudes where food is more consistent. Many of our vireos, thrushes, flycatchers, warblers and tanagers will spend their winters anywhere from Mexico to South America. In these locations, they are as equally at home as they are in North America, and there are enough insects and fruit-bearing trees to accommodate the diversity of residential birds and the snowbirds. Like passing waves, each front helps to propel birds to the north into southern Nevada, while moving other birds out to more southerly areas. The assemblage – the totality of birds represented at one location during a snapshot in time – also take on an identity that marks a later stage of songbird migration. These are the more cold-tolerant species of birds that can find food and survive under colder conditions, and many of them signal the approach of winter. Sapsuckers, flickers, Ruby-crowned Kinglets, Yellow-rumped Warblers and White-crowned Sparrows are some of these, and they will become more noticeable throughout southern Nevada’s popular birding sites. Migratory flocks of American Robins may join our resident robins, and Brewer’s Blackbirds begin to appear more and more in all the places we’d expect to see Great-tailed Grackles. Some are passing through to areas farther south, while many others will establish wintering territories in parks and neighborhoods. There is still very little known about how birds establish themselves individually over the landscape in these ways, but this is happening for all of October in southern Nevada. Sparrow diversity changes drastically during this phase of migration. Chipping and Brewer’s Sparrows continue to move out towards grassier areas such as Avi Kwa Ame National Monument, the Sonoran Desert and Mexico. Savannah Sparrows move into weedy areas and even ballfields in suburban parks. Lincoln’s quietly take over stands of invasive Phragmites or wetland edges. Dark-eyed Juncos prefer grassy parks with groves of trees. Look through amassing groups of boisterous White-crowned Sparrows for Golden-crowned and White throated Sparrows. Many sparrows will take advantage of the bounty of seeds that were produced during the closing growing season. At wetlands, transient shorebirds have mostly moved in and out, and waterfowl begin to move in. Southern Nevada hosts about twenty-five species of geese and ducks. Many of them will be arriving from wetlands in the Great Plains, Great Basin, or beyond. Visit the bird preserve or Las Vegas Wash in the morning and watch the numbers of waterfowl moving in and out of the region to appreciate the volume of ducks that move through the Las Vegas Valley. October is a great month for wildcard birding. During October, more irruptive species may be absent or present. Irruptive species are species of birds whose movements are dictated by resources that are less influenced by altitude and are more influenced by other factors. In the Western United States, Red-breasted Nuthatches and most finches tend to be the most irruptive, since their food sources are usually cone-bearing trees. Birds gravitate towards crops of successful trees and avoid areas with less success. This can be problematic if more trees in more regions begin to fail. Witnessing Red Crossbills, Evening Grosbeaks and other montane finches in the Las Vegas is possible in October. Finches are often moving between mountain ranges looking for good pine, fir or spruce crop and drop into lowland parks to drink water. Other wildcards could be wayward eastern songbirds that are out of the range that we expect them in. Warblers are especially prone to showing up, and the classic areas to look for uncommon species are areas that have tall trees, some groundcover (the more, the better) and water. Some popular places to search for many migratory land birds include Corn Creek Field Station, Floyd Lamb Park, the Henderson Bird Viewing Preserve, Clark County Wetlands Park, and Craig Ranch Regional Park. The more you get out with the intention of noticing more, the more chances there are to notice the birds that stand out as different.  Get out on the days following cold fronts and observe the changes since the last one. There are insights to glean from those experiences, and they are all useful in your own endeavor to understand the movements of birds around you. .