Mammals: Three species of rodents are endemic to this area, the El Carrizo deer mouse (
Peromyscus ochraventer) the Tamaulipan woodrat (
Neotoma angustapalata), and the Jico crested tail mouse (
Habromys simulatus). Spider monkeys (
Ateles geoffroyi), the northernmost representative of the New World primates range into this region, although it is an endangered species and not common.
Marsupials include the common opossum (
Didelphis marsupialis) and Mexican mouse opossum (
Marmosa mexicana). Other mammals such as the Mexican anteater (
Tamandua mexicana), lowland paca (
Cuniculus paca), and red brocket (
Mazama americana) are known from this region. Among the carnivores are the kinkajou (
Potos flavus),
mustelids such as tayra (
Eira barbara) and greater grison (
Galictis vittata), and five cat species including jaguarondi (
Herpailurus yaguarondi), ocelot (
Leopardus pardalis), margay (
Leopardus wiedii), Puma (
Puma concolor) and jaguar (
Panthera onca). Just a few of the many species of bats include the elegant myotis (
Myotis elegans), wrinkle-faced bat (
Centurio senex), and hairy-legged vampire bat (
Diphylla ecaudata). File:Mono Araña Centroamericano - panoramio.jpg|Spider monkey (
Ateles geoffroyi), near
Catemaco, Veracruz (4 March 2015).
Birds: Endemic birds include the red-crowned amazon (
Amazona viridigenalis), Altamira yellowthroat (
Geothlypis flavovelata), and crimson-collared grosbeak (
Rhodothraupis celaeno). File:Garza tigre mexicana - panoramio.jpg|Bare-throated tiger heron (
Tigrisoma mexicanum), Veracruz, Mex. (15 July 2011). File:Boat-billed heron (Cochleatius cochlearius), Campeche, Mex. (2015).jpg|Boat-billed heron (
Cochleatius cochlearius), Campeche, Mex. (2015). File:Collared Forest Falcon (Micrastur semitorquatus), Campeche, México (14 December 2015).jpg|Collared forest falcon (
Micrastur semitorquaatus), Campeche, Mex. (2015). File:Blue-crowned motmot (Momotus momota), Ixhuatán, Chiapas (8 March 2016).jpg|Lesson's motmot (
Momotus lessonii), Chiapas, Mex. (2016). File:Lineated woodpecker (Dryocopus lineatus), Laguna de Sontecomapan, Veracruz (4 January 2014).jpg|Lineated woodpecker (
Dryocopus lineatus), Veracruz, Mex. (2014). File:Ivory-billed woodcreeper (Xiphorhynchus flavigaster), Catemaco, Veracruz (10 January 2014).jpg|Ivory-billed woodcreeper (
Xiphorhynchus flavigaster), Veracruz, Mex. (2014). File:Megarynchus pitangua San Juan Evangelista.jpg|Boat-billed flycatcher (
Megraynchus pitangua), Veracruz, Mex. (2011). File:Yellow-throated euphonia (Euphonia hirundinacea), Laguna de Sontecomapan, Veracruz (4 January 2014).jpg|Yellow-throated euphonia (
Euphonia hirundinacea), Veracruz, Mex. (2014). File:Scrub euphonia (Euphonia affinis), Matlapa, San Luis Potosi, Mexico (11 March 2014).jpg|Scrub euphonia (
Euphonia affinis), San Luis Potosí, Mex. (2014).
Reptiles: The Morelet's crocodile (
Crocodylus moreletii) can be found in the remote areas of the rivers and lagoons in this region with turtles like the Mesoamerican slider (
Trachemys venusta) and scorpion mud turtles (
Kinosternon scorpioides). Herrera's mud turtle (
Kinosternon herrerai) and the Mexican box turtle (
Terrapene mexicana) are endemic to this region. Endemic lizards include the rare plain-necked glass lizard (
Ophisaurus incomptus) and the Cave Tropical Night Lizard (
Lepidophyma micropholis) known only from caves and the vicinity of cave openings in the Sierra Cucharas/Sierra del Abra of southern Tamaulipas adjacent San Luis Potosí. Other lizards found in the region include the silky anole (
Anolis sericeus), rainbow ameiva (
Holcosus undulatus), rose-belly lizard (
Sceloporus variabilis), Mexican spiny-tailed iguana (
Ctenosaura acanthura), and casque-headed lizard (
Laemanctus serratus). Snakes such as Iverson's threadsnake (
Rena iversoni), the brown hook-nose snake (
Ficimia olivacea), Taylor's cantil (
Agkistrodon taylori), and the Totonacan rattlesnake (
Crotalus totonacus) are largely associated with the Veracruz moist forest but all range into areas beyond the strict limits of this region. Many tropical snakes from Central America range into this region like the Central American boa constrictor (
Boa imperator), Central American indigo snake (
Drymarchon melanurus), blunthead tree snake (
Imantodes cenchoa), Mexican parrot snake (
Leptophis mexicanus), brown vine snake (
Oxybelis aeneus), tropical ratsnake (
Pseudelaphe flavirufa), tropical tree snake (
Spilotes pullatus), green ratsnake (
Senticolis triaspis), banded snail sucker (
Tropidodipsas fasciata), and terrestrial snail sucker (
Tropidodipsas sartorii). In addition to the cantil and Totonacan rattlesnake, venomous snakes from this province include the Texas coral snake (
Micrurus tener) and the terciopelo (
Bothrops asper). File:Terrapene mexicana, Mexican Box Turtle, Tamaulipas.jpg|Mexican box turtle (
Terrapene mexicana), southern Tamaulipas (30 May 2005). File:Kinosternon scorpioides Scorpion Mud Turtle, Tamaulipas.jpg|Scorpion mud turtle (
Kinosternon scorpioides), southern Tamaulipas (23 September 2004). File:Ctenosaura acanthura, Mexican Spiny-tailed Iguana, Tamaulipas.jpg|Mexican spiny-tailed iguana (
Ctenosaura acanthura) Municipality of Ocampo, Tamaulipas (13 September 2007). File:Crocodylus moreletii, Morelet’s Crocodile, Laguna del Carppintero.jpg|Morelet's crocodile (
Crocodylus moreletii), Laguna del Carppintero, Tamaulipas (21 May 2007). File:Boa imperator, Central American Boa Constrictor Tamaulipas.jpg|Central American boa constrictor (
Boa imperator), Municipality of Gómez Farías, Tamaulipas (23 August 2007). File:Agkistrodon taylori, Taylor’s Cantil, Tamaulipas.jpg|Taylor's cantil (
Agkistrodon taylori) southern Tamaulipas (24 October 2004). File:Crotalus totonacus, Totonacan Rattlesnake, Tamaulipas.jpg|Totonacan rattlesnake (
Crotalus totonacus) southern Tamaulipas (10 July 2005).
Amphibians: Although salamander diversity in Mexico is among the highest in the world, they mostly occur in mountainous areas. The broadfoot mushroomtongue salamander (
Bolitoglossa platydactyla), a lungless salamander of the
Plethodontidae family, occupies the coastal lowlands from sea level up to about 1000 meters from southern Tamaulipas to the
Isthmus of Tehuantepec. The distribution of the southern subspecies of the black-spotted newt (
Notophthalmus meridionalis kallerti) nearly matches that of the Veracruz moist forests region. There are also enigmatic reports of an isolated population of the lesser siren (
Siren intermedia) from central Veracruz.
Anuran, or frog diversity in the region is higher and among the species found in this area are the Gulf Coast toad (
Incilius nebulifer), cane toad (
Rhinella horribilis), white-lipped frog (
Leptodactylus fragilis), sabinal frog (
Leptodactylus melanonotus), elegant narrow-mouthed toad (
Gastrophryne elegans), sheep frog (
Hypopachus variolosus), and the burrowing toad (
Rhinophrynus dorsalis). The veined treefrog (
Trachycephalus typhonius) is a large species that produces sticky, mucous, skin secretions, presumed to deter desiccation in the dry season, as well as being a toxin to predators. One source list 93 species in the Guayalejo-Temesí watershed of Tamaulipas alone, but this includes
brackish-marine species. Many of the streams and rivers of this region are spring fed by
karstic aquifers, providing consistent and relatively thermally stable water compared to other basins sourced largely by precipitation. The karstic environment of the Sierra Madre Oriental produces many caves and subterranean waterways that ultimately surface near the base of the mountains in the west of this region. Some fish like the endemic phantom blindcat (
Prietella lundbergi) are adapted to caves and have been collected at depths of 50 meters in cave systems of the Rio Frio (in the Rio Guayalejo drainage). Some populations of the Mexican tetra (
Astyanax mexicanus [=
A. jordani]) also inhabit caves and are blind, although other populations of the same species living in surface streams have eyes, while still other populations are intermediate. The region is rich in platyfish and swordtail (
Xiphophorus) diversity including sheepshead swordtail (
Xiphophorus birchmanni), delicate swordtail (
Xiphophorus cortezi), mountain swordtail (
Xiphophorus nezahualcoyotl), and the endemic variable platyfish (
Xiphophorus variatus). Cichlid diversity is also high in this area including the lowland cichlid (
Herichthys carpintis) and endemic species like the chairel cichlid (
Herichthys pantostictus|Herichthys [
Nosferatu]
pantostictus) and Nautla cichlid (
Herichthys deppii) among others. Other fishes include the pigmy shiner (
Notropis tropicus), Forlón gambusia (
Gambusia regani), gulf gambusia (
Gambusia vittata), chubsucker minnow (
Dionda erimyzonops), and the endemic lantern minnow (
Dionda ipni). Conservation threats of fishes include, damming of waterways, water diversion for agriculture, runoff associated with agriculture and livestock, oil and industrial contamination, invasive species, and irresponsible recreational activities. File:Bolitoglossa platydactyla, Broadfoot Mushroomtongue Salamander, Tamaulipas.jpg|Broadfoot mushroomtongue salamander (
Bolitoglossa platydactyla), municipality of Ocampo, Tamaulipas (11 July 2005). File:Leptodactylus melanonotus WLF-255-7A, Municipio Aldama; 3 June 2004.jpg|Sabinal frog (
Leptodactylus melanonotus), municipality of Aldama, Tamaulipas (3 June 2004). File:Smilisca baudinii, Mexican Treefrog, Tamaulipas.jpg|Mexican treefrog (
Smilisca baudinii), municipality of Gómez Farías, Tamaulipas (8 August 2004). File:Trachycephalus typhonius, Veined Treefrog, Tamaulipas.jpg|Veined treefrog (
Trachycephalus typhonius), municipality of Gómez Farías, Tamaulipas (5 June 2002). File:Epigean and cave-dwelling Mexican tetras Astyanax mexicanus.jpg|Epigean and cave-dwelling Mexican tetras (
Astyanax mexicanus). File:Xipho variatus maschio.jpg|Variable platyfish (
Xiphophorus variatus), male. File:Herichthys carpintis 01.jpg|Lowland cichlid (
Herichthys carpintis). ==Conservation and threats==