Nestled in the Milk River Valley of southern Alberta, Canada, Writing-on-Stone Provincial Park, also known as Áísínai’pi in the Blackfoot language, is a UNESCO World Heritage Site renowned for its cultural significance and stunning geological formations. Beyond its ancient petroglyphs and pictographs, the park is a haven for a diverse array of wildlife, thriving in its mixed grassland prairie, coulees, and cottonwood-lined riverbanks. This article delves into the fascinating wild animals that call this sacred landscape home, with a special focus on the Pronghorn Antelope, Raccoon, and Canada Goose, highlighting their roles in the park’s unique ecosystem.
Mammals of the prairie and coulees
The park’s expansive prairie and rugged coulees provide ideal habitats for several mammal species. One of the most iconic is the Pronghorn Antelope (Antilocapra americana), often seen bounding across the open grasslands. Known as North America’s fastest land animal, Pronghorns can reach speeds of up to 88 km/h (55 mph), making them well-suited to evade predators like Coyotes in the park’s vast terrain. Their large eyes, positioned high on their heads, provide exceptional vision, allowing them to spot threats from over a kilometer away. Pronghorns are herbivorous, grazing on grasses, forbs, and shrubs, which are abundant in the park’s mixed grasslands. During the spring, visitors may observe Pronghorn fawns, which are born with an instinct to hide in tall grass to avoid detection. Their distinctive white and tan coats with black facial markings make them a striking presence in the park, and their small herds are often seen migrating across the prairie in search of food and water.
Mule Deer (Odocoileus hemionus) and White-tailed Deer (Odocoileus virginianus) are frequently spotted grazing in the coulees and along the Milk River. Their adaptability to varied habitats, from grassy plains to wooded areas, makes them a common sight for visitors. Smaller mammals, such as the Yellow-bellied Marmot (Marmota flaviventris), can be seen sunning on rocky outcrops, while the White-tailed Jack Rabbit (Lepus townsendii) and Nuttall’s Cottontail (Sylvilagus nuttallii) dart through the underbrush.
Another notable mammal is the Raccoon (Procyon lotor), a highly adaptable omnivore found along the Milk River and in the park’s cottonwood groves. Raccoons are nocturnal, often foraging at night for a varied diet that includes insects, small mammals, bird eggs, fruits, and even human food scraps if available. Their dexterous paws and keen intelligence allow them to navigate the park’s diverse environments, from riverbanks to rocky outcrops. Recognizable by their black facial mask and bushy, ringed tails, Raccoons are skilled climbers and swimmers, often seen near water sources where they hunt for crayfish or amphibians. In Writing-on-Stone, Raccoons play a role in seed dispersal, particularly for the park’s native plants like Buffaloberry (Shepherdia argentea). Their curious nature can sometimes lead them to campsites, so visitors are encouraged to secure food to avoid unwanted encounters.
Less commonly seen but equally important are predators like the Bobcat (Lynx rufus), which prowls the coulees in search of small mammals, and the Coyote (Canis latrans), a versatile carnivore known for its adaptability and distinctive yips echoing through the valley. Northern Pocket Gophers (Thomomys talpoides) and Striped Skunks (Mephitis mephitis) also contribute to the park’s mammalian diversity, each playing a role in the ecosystem, from soil aeration to seed dispersal.
Reptiles and amphibians in the desert landscape
The arid, sun-baked environment of Writing-on-Stone supports a variety of reptiles and amphibians, many of which are uniquely adapted to the harsh conditions. The Prairie Rattlesnake (Crotalus viridis) is perhaps the most notable, often found basking on the warm sandstone hoodoos. Visitors are advised to stay on trails to avoid encounters with this venomous snake, which plays a crucial role in controlling rodent populations. Bullsnakes (Pituophis catenifer), a non-venomous species, are also common, often mistaken for rattlesnakes due to their similar appearance and defensive behaviors. Plains Garter Snakes (Thamnophis radix) and Wandering Garter Snakes (Thamnophis elegans) slither through the grasslands, preying on small amphibians and insects.
Among amphibians, the Tiger Salamander (Ambystoma tigrinum) thrives in the park’s seasonal pools, while the Boreal Chorus Frog (Pseudacris maculata), Northern Leopard Frog (Lithobates pipiens), and Plains Spadefoot Toad (Spea bombifrons) add their calls to the evening soundscape. These amphibians are vital indicators of environmental health, relying on the park’s water sources for breeding.
Avian diversity along the Milk River
Writing-on-Stone is a birder’s paradise, with over 100 bird species recorded in the park. The cliffs and cottonwood forests provide nesting sites for majestic Golden Eagles (Aquila chrysaetos) and Prairie Falcons (Falco mexicanus), which soar above the valley in search of prey. The Canada Goose (Branta canadensis) is a prominent resident along the Milk River, easily recognized by its black neck, white chinstrap, and resonant honking calls. These large waterfowl are often seen in flocks, grazing on grasses near the river or floating gracefully on its waters. Canada Geese are highly social, forming strong family bonds, and their V-shaped migratory formations are a familiar sight in the park during spring and fall. In Writing-on-Stone, they nest in the cottonwood forests or on elevated riverbank sites, laying clutches of 4–6 eggs. Their adaptability to both aquatic and terrestrial environments makes them a key species in the park’s ecosystem, contributing to nutrient cycling through their grazing habits. However, their droppings can accumulate in high-traffic areas, so visitors are advised to watch their step near the river.
The park’s cottonwood forests and shrubby thickets, filled with Willow (Salix spp.), Buffaloberry (Shepherdia argentea), and Dogwood (Cornus spp.), create some of the most productive songbird habitats in southern Alberta. Species like the Sage Thrasher (Oreoscoptes montanus), Lazuli Bunting (Passerina amoena), and Spotted Towhee (Pipilo maculatus) add vibrant colors and melodies to the landscape. The Spotted Towhee, with its striking black, white, and rufous plumage, is often heard scratching in the leaf litter of shrubby areas as it forages for insects and seeds. Its distinctive “chewink” call and ground-nesting habits make it a notable presence in the park’s underbrush. These birds rely on the park’s diverse plant life for nesting and foraging, making the preservation of these habitats critical.
Aquatic life in the Milk River
The Milk River, winding through the park, supports a surprising diversity of aquatic life. Over 20 fish species inhabit its waters, including the Stonecat (Noturus flavus), a small catfish, as well as Brassy Minnow (Hybognathus hankinsoni) and Silvery Minnow (Hybognathus argyritis). These fish are essential to the river’s food web, serving as prey for birds like the Canada Goose and other predators.
Rare and unique species
Writing-on-Stone’s unique environment, shaped by 85 million years of geological history, supports species rarely found elsewhere in Alberta. The park is home to the northernmost populations of Plains Prickly Pear (Opuntia polyacantha) and Pincushion Cactus (Pediocactus simpsonii), which thrive in the dry, sandy soils. The Two-tailed Swallowtail Butterfly (Papilio multicaudata), a striking insect, flutters through the park, adding to its biodiversity. Additionally, the Ferruginous Hawk (Buteo regalis), a species of conservation concern, can occasionally be spotted soaring above the prairie, its presence underscoring the park’s role as a refuge for at-risk species.
Conservation and stewardship
The diverse wildlife of Writing-on-Stone Provincial Park is protected through careful stewardship, as outlined in the park’s management plan. Visitors are urged to observe wildlife from a distance, stay on designated trails, and avoid disturbing habitats to prevent soil erosion and damage to fragile ecosystems. Special care should be taken around Pronghorns during their spring fawning season, Raccoons near campsites, and Canada Geese nesting areas to minimize disturbance. The park’s status as a UNESCO World Heritage Site emphasizes its global significance, not only for its cultural heritage but also for its role in preserving biodiversity.
Conclusion
Writing-on-Stone Provincial Park is more than a cultural treasure; it is a vibrant ecosystem teeming with life. The swift Pronghorn Antelope, with its unparalleled speed, the resourceful Raccoon, foraging along the riverbanks, and the sociable Canada Goose, gracing the Milk River, are just a few of the park’s remarkable inhabitants. Alongside the elusive Bobcat, striking Prairie Rattlesnake, and melodious Spotted Towhee, these animals reflect the resilience and diversity of this sacred landscape. Whether hiking the Hoodoo Trail, canoeing the Milk River, or joining a guided tour, visitors have the opportunity to witness these creatures in their natural habitat, fostering a deeper appreciation for the delicate balance of nature in this remarkable corner of Alberta.
Note: Visitors should always check park advisories for safety tips, secure food to avoid attracting Raccoons, and respect the cultural and natural significance of Writing-on-Stone by adhering to guidelines, ensuring the protection of its wildlife for future generations.
