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Region profile

Sinaloa and Sonora Hills and Canyons with Xeric Shrub and Low Tropical Deciduous Forest

Sinaloa and Sonora Hills and Canyons with Xeric Shrub and Low Tropical Deciduous Forest is a subregion primarily located in the Western Sierra Madre, characterized by canyons, sub-humid and warm climates, and abundant tropical deciduous forest, where elevations range up to 2,800 masl and agricultural production is significant in the surrounding states.

Zone

Forest

Common Name

Sinaloa and Sonora Hills and Canyons with Xeric Shrub and Low Tropical Deciduous Forest

CEC Level III Code

14.3.2

CEC Level II Code

14.3 Tropical Dry Forests

Overview

About This Region

The Sinaloa and Sonora Hills and Canyons region, characterized by xeric shrub and low tropical deciduous forest, is vital for diverse pollinators. However, agricultural expansion, particularly in Sinaloa, poses a threat. Initiatives exist to protect bees, including prohibiting harmful pesticides like clothianidin, imiadacloprid, and thiamethoxam, which are dangerous to these insects. This balance between natural habitats and agricultural activity is key to the health of the region’s pollinator populations. (495 characters)

Region facts

At a glance

AliasesSinaloa and Sonora Hills and Canyons with Xeric Shrub and Low Tropical Deciduous Forest, Sinaloa–Sonora hills and canyons
Geographic Range
This subregion is characterized by canyons, sierras, and hills primarily located in the Western Sierra Madre, extending to the Sonora plain, Pacific coastal plain, and Transverse Neovolcanic Belt.
Climate SnapshotThe predominant climate is sub-humid and warm with summer rains, followed by dry and semi-dry climates, influenced by the Western Sierra Madre which creates areas of great moisture as well as dry and semi-dry areas.
Terrain ProfileThe terrain is characterized by Sierras and hills covering nearly 70 percent of the area, with elevations ranging from sea level to 2,800 masl (average of 800 masl), and dominant Litosol-Regosol soil types.
Vegetation CoverThe most abundant vegetation in this subregion is tropical deciduous forest, covering over 30 percent of the land area, with species including Bursera spp., Fouquieria spp., Leucaena spp., Stenocereus spp., Pachycereus spp., bastard cedar, and Ceiba spp.
Wildlife HabitatThe Sierra Álamos-Cuchujaqui River zone in this subregion is a vital natural protected area, home to approximately 500 animal species, including the jaguar, cougar, golden eagle, and peregrine falcon, and is believed to potentially still host the grizzly bear.

Eco snapshot

What shapes this region

Climate pattern

  • Often a strong wet/dry rhythm, with flowering and leaf growth responding quickly to rain.
  • Hot, dry conditions can dominate on exposed slopes; canyon bottoms may hold moisture longer.
  • Microclimate (small local weather differences) matters a lot: shade, wind, and soil depth can change what thrives.

Vegetation profile

The most abundant vegetation in this subregion is tropical deciduous forest, covering over 30 percent of the land area, with species including Bursera spp., Fouquieria spp., Leucaena spp., Stenocereus spp., Pachycereus spp., bastard cedar, and Ceiba spp.

Wildlife profile

The Sierra Álamos-Cuchujaqui River zone in this subregion is a vital natural protected area, home to approximately 500 animal species, including the jaguar, cougar, golden eagle, and peregrine falcon, and is believed to potentially still host the grizzly bear.

Why pollinators matter here

  • Pollinators help native plants set seed and maintain healthy plant communities after seasonal rains.
  • Diverse terrain can support many different pollinator niches—if flowering plants and nesting sites are available.
  • Dry-season gaps can be hard on pollinators, so patches with staggered bloom are especially helpful.
  • Native plants adapted to heat and drought can provide reliable nectar/pollen with less irrigation.

Seasonal timing

Planting seasons

Timing varies by microclimate; use this as a flexible guide.

Seasonal timing

  • After seasonal rains: often a good window for planting and establishment, because soil moisture is higher.
  • Cooler parts of the year: often better for planting woody natives (shrubs/trees) so roots can establish with less heat stress.
  • Hot/dry stretches: focus on mulching, deep-but-infrequent watering for new plants, and protecting seedlings from extreme sun.

Quick seasonal checklist

  • Choose locally native, drought-tolerant plants suited to your exact sun/shade.
  • Plant in clusters (3–7 of the same plant) so pollinators can feed efficiently.
  • Add a simple water source (shallow dish with stones) and refresh it often.
  • Leave some bare soil and stems for nesting (don’t “clean up” everything).

Yearly needs

Pollinator calendar

What pollinators need throughout the year, and what to do about it.

Late winter / early springDetails coming soonDetails coming soon
SpringDetails coming soonDetails coming soon
SummerDetails coming soonDetails coming soon
Late summer / fallDetails coming soonDetails coming soon
Winter or dry seasonDetails coming soonDetails coming soon

Seed mix concept

A Billion Small Steps Seed mix

In a dry-forest/xeric-shrub region, a practical seed mix idea is to plan for three roles:

Spring starter

Spring starter: early bloomers that provide the first big nectar/pollen push when conditions allow.

Summer bridge

Summer bridge: heat-tough flowers (and a few shrubs) that keep resources available through the hottest stretch.

Fall finisher

Fall finisher: late bloomers that extend nectar/pollen before the dry season or cooler season settles in.

What You Can Do

Make a difference for native habitats.

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

Plants that thrive in this region

Agaves (*Agave* (genus))

Agaves

Agaves are bold, sculptural succulents that store water in thick leaves and thrive in bright, dry spots. Their flowers can be a big seasonal draw for pollinators when plants are mature and in bloom.

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Erythrinas

Erythrinas (coral trees) are showy flowering trees in the genus Erythrina, known for bold, nectar-rich blooms that can be a seasonal food stop for pollinators in warm gardens.

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Inga (*Inga* (genus))

Inga

Inga is a group of tropical trees (genus Inga) known for fluffy, brush-like flowers and long pods. In warm climates, it can be a shade tree that also offers nectar and pollen for a variety of insects.

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Milkweeds (*Asclepias* spp.)

Milkweeds

Milkweeds from tropical Mexico (genus Asclepias) are nectar-rich wildflowers that can add bright blooms and pollinator activity to sunny gardens and containers.

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Passionflowers (*Passiflora* spp.)

Passionflowers

Passionflowers (genus Passiflora) are climbing vines known for their intricate, otherworldly blooms and their ability to add vertical color to fences, trellises, and sunny walls.

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Salvias (Mexico diversity) (Salvia spp.)

Salvias

Salvias are a big, colorful group of flowering plants in the genus Salvia, with especially rich diversity in Mexico. Many are easy, pollinator-friendly garden plants that bloom over a long season when given sun and well-drained soil.

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Wild lilacs (*Calliandra* spp.)

Wild lilacs

Wild lilacs (genus Calliandra) are warm-climate shrubs known for fluffy “powderpuff” blooms that can add color and pollinator activity to sunny gardens and patios.

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Pollinators

Pollinators active in this region

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Flower flies / hoverflies

Adults visit flowers for nectar and pollen, and many species’ larvae help keep plant-eating pests in check.

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Hawk / sphinx moths (Family Sphingidae)

Hawk / sphinx moths

They can move pollen between flowers while feeding on nectar, especially for blooms that open or scent up in the evening.

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Hummingbirds (Family Trochilidae)

Hummingbirds

They move pollen between flowers while feeding, helping many plants reproduce.

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Long-nosed bats (Genus Leptonycteris)

Long-nosed bats

They move pollen between flowers over long distances, helping some plants set fruit and seed.

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Nectar-feeding bats (Subfamily Glossophaginae)

Nectar-feeding bats

They move pollen between flowers over long distances and help many plants set fruit and seed.

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Stingless bees (Mexico / tropics) (Tribe Meliponini)

Stingless bees (Mexico / tropics)

They help pollinate many wild and cultivated plants in tropical and subtropical regions, supporting food webs and biodiversity.

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