Reptoria

Colorado River toad (Incilius alvarius)

Colorado River toad (Incilius alvarius), typical appearance of the species

Amphibians · Difficulty: Intermediate

Key facts and care guidance for Colorado River toad (Incilius alvarius) (origin: The Sonoran Desert (Arizona, northern Mexico)). Adult size around 11–19 cm. Life expectancy 10–20 years. The values below are carefully researched guidance.

Short answers

Colorado River toad: How big does the enclosure need to be?

100×50×50 cm.

Colorado River toad: What temperature does it need?

Daytime 26–32 °C, basking spot No basking spot, at night 18–22 °C.

Colorado River toad: Does it need UVB lighting?

UVB: Recommended (UVB 2–5 %).

Colorado River toad: How long do they live?

Life expectancy: 10–20 years.

Colorado River toad: Is it suitable for beginners?

Rather not – it is considered an intermediate species (difficulty: Intermediate).

Climate

Daytime temperature
26–32 °C
Night temperature
18–22 °C
Basking spot
No basking spot
Humidity
40–55 %, a short rainy season
UVB
Recommended (UVB 2–5 %)

Enclosure

Minimum size
100×50×50 cm
Substrate
Sand-loam they can dig in, stones, a shallow water dish

Feeding

Food
Large insects, roaches, earthworms
Feeding interval
2×/week

Key facts

Adult size
11–19 cm
Life expectancy
10–20 years
Origin
The Sonoran Desert (Arizona, northern Mexico)
Protection status
IMPORTANT: The skin secretion contains 5-MeO-DMT, which falls under German narcotics law. The toad itself may be kept – extracting, possessing and passing on the secretion are criminal offences. In parts of its range, taking it from the wild is additionally prohibited.
Brumation
A dry rest of 8–12 weeks
Cohabitation
Keeping singly is always safe. A pair works as long as both animals are roughly the same size and are fed separately. As soon as one animal refuses food, loses weight or shows injuries, separate them - this is not an exception but the planned normal case.

Notes

A desert species with a long dry rest and a short rainy season; without this rhythm there is no breeding. The skin toxin is highly active in humans and pets – never lick it or let it be milked, as dogs die from it. The legal position around the secretion is unambiguous: hands off.

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Related species

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What you need to start

To keep Colorado River toad (Incilius alvarius) you typically need: a suitable enclosure (100×50×50 cm), substrate (Sand-loam they can dig in, stones, a shallow water dish), a heat source with a thermostat, UVB lighting, thermometer and hygrometer, a water dish and hides. You will find equipment in the Reptoria marketplace.

The complete, interactive care database is in the Reptoria app.

Last updated: 30 October 2026 · Editor: Reptoria editorial team · Sources include: https://de.wikipedia.org/wiki/Coloradokr%C3%B6te, https://en.wikipedia.org/wiki/Incilius

All values are non-binding guidance and do not replace expert advice. Research thoroughly from several sources before acquiring and keeping an animal, and observe the applicable law (species and animal protection in particular).