
Amazon milk frog
Trachycephalus resinifictrix
Photo: Phrynohyas resinifictrix Warsaw Zoo 02 · Crusier · CC BY 3.0 · Changes and credits
These guides provide general husbandry information and do not replace veterinary assessment. If your animal shows symptoms or its condition worsens, contact a veterinarian experienced with exotic animals.
- Warm zone
- Daytime air: 24–26 °C
- Cool zone
- Cool air: 21–24 °C
These notices cover the cited provisions, not every possible national or local rule. Check additional requirements with the competent authority.
Description
Trachycephalus resinifictrix is an arboreal frog of Amazonian forests. Its sturdy body has alternating brown and pale bands, especially contrasting in juveniles, and broad adhesive toe discs. It is mainly nocturnal and breeds in water-filled tree cavities, where its tadpoles also develop. Its common name refers to a whitish defensive skin secretion.
Housing together
Trachycephalus resinifictrix can be kept in a small group of similarly sized adults with multiple sturdy perches, cover and free access to water. Rear juveniles separately from adults and monitor individual feeding. Separate frogs that lose weight or are excluded from meals; do not add other species.
Enclosure and climate
Set up a vertical enclosure with branches, broad leaves and an accessible basin. Maintain air exchange and use dechlorinated water; keeping the basin clean is an essential part of environmental care.
Night: 20–22 °C. Air temperatures; a surface basking temperature is not separately established.
Setup
Prepare new water in a dedicated container and treat chlorine and chloramine before using it for dishes, substrate or misting, following product instructions.
Making height usable
Secure horizontal, sloping and vertical branches to the structure, using diameters that offer grip and supports suitable for adult weight. Connect them from the exposed lighting branch to the cool area, distributing supports across levels. Place hide entrances beside branches; add foliage along routes without blocking dishes, doors or vents.
Testing and access
Connect specified heat sources to compatible thermostats and guard against contact. Secure probes according to device instructions; measure air at resting sites and heated surfaces separately with independent instruments. In housing with water, also check water temperature and quality: one zone’s thermostat does not control the others.
With the complete enclosure running, record day and night readings and compare them with the sheet. Test doors, cable openings and cleaning access, keeping vents clear. Change one variable at a time and recheck after each adjustment.
Lighting and UVB
Zone 3: open or partial sun exposure; ecological UVI band 1–2.6.
At the exposed position aim for approximately UVI 1–2, measured at the back or head. The animal must choose its exposure and reach UVI 0 retreats. This local target differs from the Ferguson ecological band and should not be maintained everywhere throughout the day.
UVB is recommended at an intensity appropriate to the species, with the option to withdraw from the light. Evidence of its necessity varies between animals: assess exposure alongside diet and species identification.
UVA: the precise requirement is not established for this entry; no separate UVA source is prescribed. Evaluate illumination, retreats and life stage together.
Linear UVB tube with reflector. Indicative UVB percentage stated on the lamp: 2–7%; final selection depends on UVI achieved at the actual distance.
For maintenance, a cycle of approximately 12 hours of light and 12 hours of darkness can serve as an initial reference. Use a timer to switch lights off at night, and keep retreats available so the animal can withdraw from light during the day. Adapt day length to species and origin, following the specific guidance for seasonal care and breeding.
Light in the animal’s daily life
Ecological zone 3 and the lower practical peak use different criteria. Retain cavities and screened leaves with voluntary access to exposure; do not brightly irradiate every resting site.
An example layout in the enclosure
To make the layout concrete, take housing measuring 45 × 45 × 60 cm, using the first dimensional configuration in the sheet. This is a mounting example: retain the conditions and any alternatives attached to the stated minimum.
In a wooden enclosure with internal lighting, imagine the tube 55 cm above the floor and the back or head at 25 cm. The geometric distance is therefore 30 cm. The branch or platform lies below animal height, according to body size. Place lighting over one side, with a route to fully screened retreats.
In a glass enclosure with a mesh roof, retain the same animal height and imagine the tube 5 cm above the mesh: distance becomes 40 cm. Mesh attenuates UV variably; ordinary glass roofs block UVB. Increasing the percentage alone is insufficient: measure beneath the mesh and adjust height, output or layout as needed.
These distances describe the example, not a safe clearance for every lamp. Select the source and adjust mounting until approximately UVI 1–2 is measured at animal height in the exposed position. Also respect the minimum clearance specified for the model used. Recheck with furnishings, guards and mesh installed, including the highest reachable points and animal growth.
Choosing and checking lighting
First define the patch that should illuminate the whole body and the route to a screened retreat. For a broad patch, select a linear tube with reflector; consider a compact only if its useful patch covers the body and leaves an accessible gradient. Check model, output, reflector and mounting distance, then compare measured UVI with the species target. Label UVB percentage alone cannot determine distance and intensity.
The decisive check uses a UVI meter facing the source at animal height. Check the centre and edges of the exposed patch, the highest supports and retreats, which must allow withdrawal from UV. Repeat after moving equipment, changing lamps and plant growth. Without a meter, use the manufacturer’s instructions and measurements for the exact configuration, including safety clearances.
When UVB or UVA are absent
When keeping without UVB, D3 must be supplied through a complete diet or species-appropriate supplementation. Calcium alone does not replace D3. Check existing amounts in prepared diets and multivitamins before combining products; dosage also depends on diet and cannot be derived from lighting hours.
UVA has no dietary replacement. Maintain appropriate illumination and photoperiod without adding an intense source to compensate for unverified information: amphibian exposure must be evaluated by species and life stage.
Humidity and ventilation
Maintain humidity at 60–80%, with ventilation and surfaces that can dry. Place the hygrometer beside resting branches, outside the direct water spray, and compare readings with the cool area. Record the trend after water input; if readings stay outside the specified range, check foliage blocking vents and surfaces that remain wet before adjusting misting.
Feeding
Offer Trachycephalus resinifictrix varied invertebrates with appropriate supplementation. Offer in the evening on accessible supports; differently sized juveniles need to feed without competition.
Recommended foods
The tiers describe dietary use: rotate foods within each tier rather than treating them as an absolute nutritional score.
| Food | Dietary role | Benefits and limits | Preparation |
|---|---|---|---|
| Crickets and locusts | Main choices | Supply protein and encourage hunting; calcium is low relative to phosphorus, so preparation and supplementation are needed. | Use captive-bred insects and gut-load them as described below. Select suitably sized feeders, place the meal’s batch in a clean container and apply a thin calcium coating immediately before offering them. |
| Feeder roaches | Main choices | These feeders provide a useful second protein source for rotation, but do not constitute a complete diet or replace calcium supplementation. | Offer well-fed soft nymphs sized to the mouth; avoid excessively hard adults. |
| Silkworms and black soldier fly larvae | For rotation | Diversify texture and nutrients. Black soldier fly larvae can supply more calcium, but content depends on rearing: they do not make the entire diet complete. | Choose appropriately sized feeder larvae. Keep silkworms on their specific food; check the supplier’s supplementation guidance. |
| Waxworms, mealworms and superworms | Occasional | Fat-rich larvae concentrate energy and often contain little calcium: use as a small part of variety, not the sole food. | Replace part of the meal instead of adding them to a full ration. Avoid hard or oversized larvae for small animals. |
| Wild insects, fireflies and contaminated prey | Avoid / not a staple | May carry pesticides, parasites or toxins; a healthy appearance does not establish safety. | Use traceable feeder cultures; do not collect insects beside roads or treated gardens. |
Comparable nutritional values
Protein, fat, calcium and phosphorus are percentages of dry matter, excluding water; dry matter itself is a percentage of fresh weight. These are reference analytical values compiled in a clinical table, not guaranteed contents of your batch or a universal ranking. Age, rearing, feeding and supplementation change composition. Do not compare them directly with fresh-food percentages or already diluted prepared diets. Comparable numbers are not provided for other foods.
| Insect | Dry matter | Crude protein | Crude fat | Calcium / phosphorus | Ca:P |
|---|---|---|---|---|---|
| Adult house cricketAcheta domestica | 32% of fresh weight | 62.6% DM | 20.4% DM | 0.3 / 1% DM | 0.3:1 |
| Migratory locustLocusta migratoria | 31% of fresh weight | 67.5% DM | 14% DM | 0.1 / 0.7% DM | 0.14:1 |
| Mealworm larvaTenebrio molitor | 32.8% of fresh weight | 52.8% DM | 36.1% DM | 0.3 / 0.8% DM | 0.37:1 |
DM = dry matter. Ca:P describes calcium relative to phosphorus before supplementation: a protein-rich feeder may still be calcium-poor. Offered portions remain those for this species and life stage.
Meals by age and size
| Stage and size | Frequency | Amount per meal |
|---|---|---|
| Newly metamorphosed: tail absorbed and terrestrial feeding established | Daily, small portions | Pinhead crickets or other microfeeders in small batches; count catches for about 5 minutes. Do not leave large crickets with newly emerged froglets. |
| Growing juveniles and subadults | Daily, moving to alternate days as growth slows | Initial trial portion: 3–5 small insects, one at a time. Count those eaten in about 5 minutes; stop when interest wanes rather than continually refilling. Adjust the count to actual prey size and growth. |
| Adults with slowed growth | 3–4 meals weekly | Initial trial portion: 3–5 small insects, one at a time. Count those eaten in about 5 minutes; stop when interest wanes rather than continually refilling. Adjust the count to actual prey size and growth. A suitable earthworm can replace part of the insects in species accepting it. |
Adjusting portions
To assess the portion, compare the amount and type of food eaten with growth and body condition. Weekly weighing of juveniles and monthly weighing of adults helps follow the trend. Adjust the ration gradually when growth or reserves require it; reduce it if body condition indicates excess weight or leftovers remain. Investigate unexpected weight loss or abnormal swelling rather than addressing it only with more or less food.
Preparing and offering meals
Prepare insects during the 24–48 hours before feeding: keep them in their culture container with a complete feeder diet and safe hydration. Check access to food and water and remove spoiled leftovers. Then select feeders of the specified size and prepare only the batch to be offered. This step, called gut-loading, improves prey quality; bran or potato alone do not correct deficiencies.
At feeding time the prey should be easy to swallow. As an initial guide, choose insects no wider than the space between the eyes, then adapt size to the mouth and the animal’s response. Offering them individually or in an escape-resistant dish lets you see actual intake and remove leftovers.
Use clean equipment and water treated for chlorine and chloramine for tongs, bowls and rinsing; avoid soap residue. Offer near the animal without making it swallow substrate.
Calcium and vitamins
Immediately before feeding, lightly coat low-calcium insects with phosphorus-free calcium: they should remain visible, without clumps. Common insects often have an unfavourable calcium:phosphorus balance; rotating them alone does not correct it.
Choose one supplementation programme: plain calcium for ordinary meals and a species-appropriate multivitamin at its labelled feeding intervals. Record the product and its existing D3 and vitamin A; do not add a second dose to meals using a combined product. With measured UVB, agree the oral D3 provision; product concentrations are not interchangeable.
For amphibians choose a product appropriate for vitamin A as well; beta-carotene alone should not be considered equivalent in every species. Therapeutic vitamin A doses require a veterinarian.
Daily care
First days
Keep retreats accessible and observe without opening them to look for the animal. Check climate readings from outside, offer scheduled food and record actual intake. Prepare the scales and container before weighing so the transfer stays brief; compare weight with earlier records rather than relying on appearance alone.
Cleaning
Keep animals and equipment away from kitchens and food areas, use tools dedicated to each enclosure and wash your hands with soap and running water after handling animals, food, tank water or furnishings. Quarantine new arrivals separately and agree the duration and checks with a veterinarian before introducing them to established animals.
Handling
Observe the frog without routine handling. Use moist gloves for necessary transfers.
Checks
Record weight, appetite and behaviour; consult a veterinarian experienced with the species if changes persist. For laboured breathing or wounds, contact them promptly without waiting for symptoms to persist.
Breeding
Sex, maturity and readiness
Identify adults of the same species, with the female generally larger and the male also recognisable by calling. Record origin: the trade name “milk frog” alone is insufficient. Prepare rearing housing before offering a breeding site.
Start a record for each breeding animal with identity, origin, documented age and previous weights. Compare the weight trend with growth and body condition; delay introductions for animals still growing rapidly, losing weight or recently acquired. Use stated ages as guidance alongside these checks. If sex cannot be identified reliably, obtain assessment by qualified personnel before pairing.
Preparation and seasonal cycle
Provide an artificial cavity or accessible water basin among sturdy branches: the species breeds in water-filled tree cavities. Maintain gradual seasonality and opportunities to rest out of water; the entire enclosure need not be flooded.
Before encounters, prepare and test offspring enclosures and have first foods available. Check records for regular adult feeding and good body condition, then verify access from exposed areas to retreats. If the species protocol includes seasonal changes, adjust settings gradually and record the response. Record night-time air, surface and egg temperatures separately, noting where each is measured. Keep water available throughout preparation.
Courtship and mating
The male calls at the aquatic site and clasps the female in amplexus. Keep the container stable and access clear; record calling, introduction and spawning separately. Prepare resting housing for the female after spawning.
Spawning and egg collection
Eggs float in the aquatic site. Maintain the clutch in clean water and arrange a separate tadpole tank with guarded intakes and inspectable edges. Count larvae during transfer and increase space as they grow.
Aquatic development and hatching
Hatching in 24–48 hours and metamorphosis generally within 6–10 weeks are documented. Maintain stable conditions and observe stages without deriving one temperature from these durations. Provide very low exits before tadpoles emerge.
Use water treated for chlorine and chloramine at the same temperature as the original container. Guard intakes and keep movement gentle. Check eggs and water daily, remove dead material without breaking healthy eggs, siphon leftovers and faeces, test ammonia and nitrite and change water with prepared water as needed.
First meals and juvenile care
Offer tadpoles fine omnivorous tadpole food in small monitored portions, removing leftovers. Newly metamorphosed frogs are weak swimmers: provide damp surfaces, low supports and water shallow enough to hold the head above it. Introduce supplemented pinhead crickets and other microfeeders, checking appetite and coordination individually.
Observe each larva’s feeding, growth and developmental stage daily, avoiding unnecessary capture for weighing. Also check water quality, injuries and size differences: a feeding group does not establish that every larva eats. Separate injured individuals or those excluded from food, and adjust space and diet as they develop. For forms that become terrestrial, prepare gentle exits and shelters before the transition to land.
Female recovery
After reproduction provide water and the usual balanced diet, initially in manageable portions; monitor weight, activity and return of appetite. Keep supplements and lighting consistent with the feeding guide. Avoid further introductions until the previous condition has recovered; later clutches may occur without another mating. Persistent straining, weakness or protruding tissue require veterinary attention, without squeezing the abdomen.
Equipment and example diary
Prepare rearing tanks, covers, a mature sponge filter or containers for regular water changes, water tests, a narrow siphon, thermometer and productive first-food cultures. The number of offspring raised must match the actual capacity to feed them and maintain clean water.
A consistent diary using actual dates helps follow reproduction in Trachycephalus resinifictrix. Start with adult identity, weight and condition, then record observed encounters, laying or birth and development conditions. After emergence record the first meal actually accepted and each youngster’s growth while continuing to follow female recovery. Over time these records help identify your lineage’s pattern without turning approximate durations into deadlines.