Koala
Phascolarctos cinereus
Explore the complete life journey from birth to maximum documented longevity. Move the interactive age slider below to see real-time biometric growth ranges, developmental milestones, metabolic changes, and ontogenetic stages.
Interactive Lifespan & Growth Scrubber
Drag the slider or click any milestone step to observe dynamic biometrics and physiological changes.
Milk.
Dependent early stage (eucalyptus detox).
Taxon-Specific Life Stage Machine
How Koala progresses through distinct morphological phases.
Neonate
Tiny neonate crawls to the rearward-facing pouch.
- •Embryonic appearance
- •Forelimb crawl reflex
Pouch Young
Attached to teat; organ systems mature in pouch.
- •Eyes closed early
- •Rapid growth on milk
Emerging Joey
Leaves pouch periodically; learns eucalyptus detox.
- •Furred
- •Eyes open
Adult
Sexually mature adult.
- •Adult dentition
- •Full size
Elder
Reduced condition with age.
- •Tooth wear
Growth Timeline Reference Matrix
Standardized peer-reviewed biometric development data.
| Age Milestone | Life Stage | Total Length Range | Body Mass Range | Maturity | Dietary Regime |
|---|---|---|---|---|---|
| 🐨Birth / Hatch / Day 0 | Neonate | 2–2.5 cm | 0.0004–0.0005 kg | 0% | Milk. |
| 🐨Early growth | Pouch Young | 9–12.4 cm | 0.48–1.7 kg | 12% | Pap then eucalyptus. |
| 🐨Mid juvenile | Joey | 22.3–31.4 cm | 1.4–4.9 kg | 35% | Specialized eucalyptus leaves. |
| 🐨Late juvenile | Joey | 36.8–52 cm | 2.4–8.4 kg | 60% | Specialized eucalyptus leaves. |
| 🐨Near maturity | Adult | 51.3–72.6 cm | 3.4–11.9 kg | 85% | Specialized eucalyptus leaves. |
| 👑Prime adult | Prime Adult | 58.8–83.4 cm | 3.9–13.7 kg | 98% | Specialized eucalyptus leaves. |
| 👑Later adult | Elder | 60–85 cm | 4–14 kg | 100% | Specialized eucalyptus leaves. |
Key Milestones in the Life of a Koala
Koala Early Independence Skills
Critical early learning period unique to koala ecology.
Peak Growth Window
Pouch to 12 months is when size accumulates fastest.
Sexual Maturity
Typical maturity near 3 years for this species.
Adult Niche Mastery
Adults specialize in eucalyptus detox.
Diet Transition
Pap then eucalyptus.
Frequently Asked Questions About Koala Life History
Scientific answers to high-intent queries regarding lifespan and growth.
