The Caatinga is a semi-arid ecoregion covering the drier interior of northeastern Brazil, stretching across states including Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, Sergipe, Bahia, and parts of Minas Gerais, and it ranks as the largest dry forest region in South America. Its vegetation is a heterogeneous xeric shrubland and thorn forest of small, drought-deciduous thorny trees, with a ground layer rich in cacti and succulents such as the mandacaru (Cereus jamacaru) and prickly pears (Opuntia), alongside carnaúba palms and fruit-bearing trees like umbú. The climate is hot and dry, with six to eleven dry months a year and average annual rainfall ranging from about 250 to 1,000 millimeters. Despite this aridity, the Caatinga harbors a unique biota with many endemic species and is the home of its flagship bird, the Spix's macaw (Cyanopsitta spixii), though less than seven percent of the ecoregion is currently protected. For gardeners in hot, dry climates, its native cacti such as Opuntia and Cereus are familiar ornamental and edible-fruit genera.
Marker placed inside the RESOLVE 2017 polygon at 8.9°S, 39.9°W.
Climate snapshot for this ecoregion
°C
°F
Current zone range (2011–2040)
13a-13b
Plotwright
CHELSA-derived typical winter month at this ecoregion's bbox grid.
Projected (2041–2070)
13b
Plotwright
Where the CHELSA models say the typical winter month is heading.
Average warming this ecoregion is on track for: +3.0°F by mid-century. SSP3-7.0 (current trajectory) · CHELSA v2.1 bio06 sampled across 10 of 10 points within this ecoregion's bounding box.
At a glance
Dominant biome
Tropical & Subtropical Dry Broadleaf Forests
Realm
Neotropic
Approximate area
283,848 sq mi
Conservation tier
Nature Imperiled (Dinerstein NNH 4)
About the tropical & subtropical dry broadleaf forests biome
Tropical forests that pass through a pronounced dry season, when many trees drop their leaves to conserve water. They hold high biodiversity but are among the most threatened tropical habitats, sensitive to fire and to clearing for agriculture.
Catalog plants suited to this ecoregion
No catalog plants intersect this ecoregion's zone range. As the catalog grows to cover this region's climate band, suggestions will surface here.
Collections for this ecoregion
No curated collection's plants all fit this ecoregion's zone range. We surface a collection only when every member would grow here — partial fits get filtered out rather than mislead. As the catalog and the curated set both grow, this section will fill in.
Related ecoregions
Other tropical & subtropical dry broadleaf forests ecoregions to explore: