Sierras of Guerrero and Oaxaca with Conifer, Oak, and Mixed Forests is an extensive, geologically complex, mountainous region of 73,330 km2, characterized by high biodiversity, mixed pine-oak forests, and a highly humid climate with high annual rainfall.
Zone
Forest
Common Name
Sierras of Guerrero and Oaxaca with Conifer, Oak, and Mixed Forests
CEC Level III Code
13.5.2
CEC Level II Code
13.5 Temperate Sierras
Overview
Region facts
| Category | Details |
|---|---|
| Aliases | Sierras of Guerrero and Oaxaca with Conifer, Oak, and Mixed Forests, Sierras of Guerrero and Oaxaca with Conifer Oak and Mixed Forests |
| Geographic Range | This extensive mountainous area covers 73,330 km2 in the southern part of Mexico, stretching 700 kilometers on the Pacific side and over 350 kilometers on the Gulf of Mexico side. |
| Climate Snapshot | The region is characterized by a subtropical climate on the Pacific slopes and a humid temperate climate at high elevations, with exceptionally high annual rainfall (2,000–4,000 mm), moisture year-round from fog and rain, and is affected by hurricanes and orographic barriers creating climatic contrasts. |
| Terrain Profile | This geologically complex, mountainous subregion is characterized by uplifts, faults, igneous intrusions, and complex folding, with the highest elevations, such as Cerro Quie Yelaag and Cerro Quiexobee, reaching 3,700 meters above sea level. |
| Vegetation Cover | This subregion is primarily characterized by mixed pine-oak forests, oak forests, cloud forests, and pine forests, showcasing high biodiversity and plant endemisms due to the combination of Neotropical and Neartic elements and high rainfall. |
| Wildlife Habitat | The Sierras of Guerrero and Oaxaca are home to abundant wildlife, including various birds like the black eagle and hummingbird, mammals such as the jaguar and ocelote, aquatic species like neotropical otters, and reptiles including rattlesnakes and boa constrictors. |
Eco snapshot
This subregion is primarily characterized by mixed pine-oak forests, oak forests, cloud forests, and pine forests, showcasing high biodiversity and plant endemisms due to the combination of Neotropical and Neartic elements and high rainfall.
The Sierras of Guerrero and Oaxaca are home to abundant wildlife, including various birds like the black eagle and hummingbird, mammals such as the jaguar and ocelote, aquatic species like neotropical otters, and reptiles including rattlesnakes and boa constrictors.
Seasonal timing
Yearly needs
What pollinators need throughout the year, and what to do about it.
| Season | What pollinators need most | What you can do |
|---|---|---|
| Late winter/early spring | Early nectar/pollen; safe shelter as temperatures swing | Add a few early-blooming natives; leave some leaf litter and stems; provide a shallow water source with landing stones |
| Spring | Steady bloom; nesting sites for bees starting new nests | Plant a mix of flowers and shrubs; keep some bare, well-drained soil; avoid all pesticide use |
| Summer | Heat/dry resilience; continuous flowers; water access | Prioritize drought-tolerant natives; water new plantings when needed; keep blooms coming with mid-season species |
| Late summer/fall | “Last chance” nectar/pollen; energy for overwintering or dry-season survival | Add late-blooming natives; avoid cutting everything back; let some plants go to seed |
| Winter or Dry Season | Shelter from cold/dry conditions; undisturbed nesting areas | Leave stems, logs, and leaf litter in place; plan next season’s plant additions; avoid “cleanup” that removes habitat |
Seed mix concept
Spring starter: early-blooming natives that provide the first reliable nectar/pollen.
Summer bridge: heat- and rain-season-tolerant flowers that keep food available through the longest stretch.
Fall finisher: late-blooming plants (often asters/goldenrods in many regions) that help pollinators build reserves.
What You Can Do
Turn this knowledge into action. Whether you plant a single pot or a whole garden, you are building a vital bridge for local biodiversity.
Join the movement to restore our shared habitats.
Native plants
Asters are late-season wildflowers that bring a burst of daisy-like blooms when many gardens are winding down, making them a reliable choice for pollinator-friendly planting.
Blackberries and raspberries (genus Rubus) are flowering bramble shrubs that can feed pollinators in bloom and people later with tasty berries—great for yards, school gardens, and even large containers with support.
Blazing stars (Liatris) are upright, purple-pink wildflowers that bloom in showy spikes and are well-loved by many pollinators. They’re a strong choice for sunny gardens, borders, and meadow-style plantings.
Blueberries and huckleberries (genus Vaccinium) are berry-producing shrubs with spring flowers that can support pollinators and later feed people and wildlife—great for gardens, schoolyards, and even large containers.
Coneflowers (Echinacea) are tough, long-blooming wildflowers that bring steady color and reliable nectar and pollen to gardens, schoolyards, and even large containers.
Currants and gooseberries are Ribes shrubs that offer early-season flowers for pollinators and later berries for people and wildlife. They’re a great choice for edible landscapes, mixed borders, and small yards where you want a plant that does more than one job.
Goldenrods are tough, sunny wildflowers in the genus Solidago that light up late-season gardens with golden blooms and provide reliable nectar and pollen when many other flowers are fading.
Ironweeds are tall, purple-blooming wildflowers in the genus Vernonia that bring late-season color and steady nectar to pollinator gardens.
Joe-Pye weeds are tall, late-season native wildflowers in the genus Eutrochium that bring big, fluffy flower clusters to gardens and give pollinators a reliable place to feed when many other plants are winding down.
Maples are familiar shade trees that offer early-season flowers and later seeds, supporting a range of pollinators and adding strong structure to yards, school grounds, and streetscapes.
Milkweeds are tough, nectar-rich wildflowers in the genus Asclepias that can turn a garden bed, schoolyard edge, or even a sunny pot into a pollinator stop.
Mountain mints are tough, fragrant native wildflowers that bloom in summer and are famous for drawing in a busy mix of pollinators. They’re easy to grow, handle a range of garden conditions, and make a great “plant it and watch it” choice for pollinator patches.
Oaks are long-lived trees that can anchor a yard, school ground, or park with shade, structure, and lots of seasonal interest. Many pollinators use oak flowers in spring, and the tree’s leaves and bark support a wide web of life over time.
Prairie coneflowers (Ratibida) are tough, sunny wildflowers with drooping petals and a bold cone-shaped center that pollinators can easily find. They’re a great choice for low-fuss gardens, schoolyards, and naturalized patches where you want long-lasting summer color.
Rushes are tough, grass-like wetland plants (genus Juncus) that thrive in damp soil and help create calm, sheltered habitat at the edges of ponds, rain gardens, and low spots.
Sedges (genus Carex) are grass-like plants that form tidy clumps and thrive in many garden conditions, especially where soil stays a bit damp. They add texture, cover bare ground, and can support small wildlife by providing shelter and nesting material.
Serviceberries (genus Amelanchier) are small trees with early-season blossoms, edible berries, and strong wildlife value—an easy way to add beauty and pollinator support to a yard, school garden, or even a large container.
Native sunflowers are bright, tough wildflowers in the genus Helianthus that feed pollinators and add cheerful color from mid-season into fall.
Wild bergamot and other bee balms (the genus Monarda) are easygoing native wildflowers known for their shaggy, pom‑pom blooms that draw in lots of pollinators. They’re a great choice when you want long-lasting summer color and a plant that feels lively with buzzing visitors.
Willows are fast-growing trees and shrubs in the genus Salix that offer some of the earliest pollen and nectar of the year, making them a strong choice for pollinator-friendly yards, parks, and school grounds.
Pollinators
Adults visit flowers for nectar and can move pollen between blooms; their presence is a sign of diverse, functioning habitats.
Many brushfoots move pollen between flowers as they feed, and their caterpillars are part of healthy food webs.
Bumble bees are important pollinators of many wildflowers and garden plants, helping ecosystems and food crops reproduce.
Adults visit flowers for nectar and pollen, and many species’ larvae help keep plant-eating pests in check.
They can move pollen between flowers while feeding on nectar, especially for blooms that open or scent up in the evening.
They move pollen between flowers while foraging, helping many wild plants and garden plants set seed and fruit.
They move pollen between flowers while foraging, helping many wild plants and garden crops set seed and fruit.
They move pollen between flowers while foraging, helping many wild plants and garden plants set seed and fruit.
They can move pollen while drinking nectar, and they also help control many plant-eating insects.
They’re part of healthy food webs and plant communities, and their caterpillars depend on a wide range of native trees and shrubs.
Skippers visit many flowers for nectar and can help move pollen between blooms while they feed.
Many small moths move pollen while feeding on nectar, supporting wild plants and garden blooms—especially in the evening and at night.
Many adults visit flowers and can move pollen between blooms, while also helping control some garden pests.
Adult swallowtails visit many flowers for nectar and can help move pollen between blooms as they feed.
They help move pollen between flowers in gardens, parks, and natural areas, supporting seed and fruit production.
They visit a wide range of flowers for nectar and can help move pollen between blooms as they feed.
