Game
Shed: a new skin
Snakes grow out of their skin. Help one through a shed, from the cloudy-eyed blue phase to a fresh, bright skin, and try to leave the old one in one piece.
Based on published research · pending expert review
- Skin looseness
- —
- Lifted at the snout
- 0%
- Touching
- Nothing
- Out of the old skin
- 7%
- Grip
- None
- Speed
- Still
- Strain
- Calm
- Tears
- 0
Move the head with the arrow keys, or drag it.Hold → or Space to crawl, ↑ ↓ to steer, or press and hold where you want to go.F toggles full screen.
Three stages, no clock: wait out the blue phase, open the skin at the snout, then crawl out of it.
The blue phase. Pick a hiding place. Damp air loosens the old skin.
Start at the snout. Rub the head on something rough until the skin opens.
Crawl out. Go slowly past rocks and twigs that hold the old skin. Rushing can tear it.
Reptiles need more humidity while they shed, and a snake in the blue phase sees poorly and keeps out of sight.2,6,7
Day 1 of 7
Snakes rub the head against something rough, such as a rock or a tree, to tear the old skin open near the snout.1,2
The snake crawls out through tight spaces, and the old skin peels back inside out, like a sock.1
A clean shed
0points
- Hiding place
- 0
- Rough surfaces
- 0
- One piece
- 0
- Care
- 0
The shed
In one piece. 9
What the research says
The whole outer layer
Snakes regularly shed the outermost layer of their skin, a process called ecdysis. Most shed it in one continuous piece, though giant snakes may tear theirs.1,3,9
The blue phase
Before a shed, the skin turns bluish and the eyes become cloudy, because fluid gathers between the old outer layer and the new one. The snake cannot see well. This inactive spell can last about a week: snakes generally stop foraging and keep out of sight. The eye caps clear again shortly before the shed.1,2,3,4,5,7
It starts at the snout
A snake begins by rubbing its head against something rough, such as a rock or a tree, until the old skin tears open near the snout. It then crawls out, often through tight spaces, and the skin peels back inside out, like a sock pulled off. The whole process can take from days to a couple of weeks.1,2
Humidity helps
Reptiles need more humidity while they shed. An incomplete shed, called dysecdysis, can follow from the wrong humidity, mites, handling or poor nutrition. An eye cap that stays behind can cover the eye and restrict vision.3,4,6
Shedding and growth
Snakes shed to renew their skin and to make room as they grow. Younger snakes usually shed more often than adults, because they are still growing. Temperature, humidity, food and breeding also change how often a snake sheds.2,7,8
A shed tells a story
A shed skin keeps the snake's pattern and the shapes of its scales. In a study of 53 snake species in Taiwan, almost every species could be identified from its sheds. Sheds are usually slightly longer than the snake, because the skin is stretched as it comes off: about 11% longer on average in the work that study cites.9
About the Indian rock python
A brooding female Indian python shivers to make heat, keeping her body near 32.5 °C while she coils around her eggs. (From its species profile.)
Most snakes shed in one piece, but giant snakes may tear their skin as it comes off.3
Read about the Indian rock pythonAbout the Indian rat snake
An Indian rat snake in Mumbai was seen swallowing a live Indian rock python whole, starting from the python's tail. (From its species profile.)
Read about the Indian rat snakeAbout the green vine snake
Its horizontal, keyhole-like pupils are unusual among snakes. One early naturalist estimated its field of view at about 330 degrees. (From its species profile.)
Read about the green vine snakeThe science
How a snake sheds
The game is a simplification. These are the findings it is built on.
The whole outer layer
Snakes regularly shed the outermost layer of their skin, a process called ecdysis. Most shed it in one continuous piece, though giant snakes may tear theirs.1,3,9
The blue phase
Before a shed, the skin turns bluish and the eyes become cloudy, because fluid gathers between the old outer layer and the new one. The snake cannot see well. This inactive spell can last about a week: snakes generally stop foraging and keep out of sight. The eye caps clear again shortly before the shed.1,2,3,4,5,7
It starts at the snout
A snake begins by rubbing its head against something rough, such as a rock or a tree, until the old skin tears open near the snout. It then crawls out, often through tight spaces, and the skin peels back inside out, like a sock pulled off. The whole process can take from days to a couple of weeks.1,2
Humidity helps
Reptiles need more humidity while they shed. An incomplete shed, called dysecdysis, can follow from the wrong humidity, mites, handling or poor nutrition. An eye cap that stays behind can cover the eye and restrict vision.3,4,6
Shedding and growth
Snakes shed to renew their skin and to make room as they grow. Younger snakes usually shed more often than adults, because they are still growing. Temperature, humidity, food and breeding also change how often a snake sheds.2,7,8
A shed tells a story
A shed skin keeps the snake's pattern and the shapes of its scales. In a study of 53 snake species in Taiwan, almost every species could be identified from its sheds. Sheds are usually slightly longer than the snake, because the skin is stretched as it comes off: about 11% longer on average in the work that study cites.9
What the game simplifies
- Most of these sources describe snakes in general, and several describe snakes kept by people. None is about the three species in the game in particular.
- The hiding places, the looseness, grip and strain values and the points are game rules, not measurements.
- The blue phase is shortened to a few seconds. In life the whole shed can take from days to a couple of weeks.
References
- 1
Iowa Department of Natural Resources (2015). Why do snakes shed their skin? From the "But Why?" column, Iowa Outdoors, July/August 2009. iowadnr.gov
- 2
Forest Preserve District of Will County (2020). Nature curiosity: Why do snakes shed their skin? 19 August 2020. reconnectwithnature.org
- 3
Yadlapalli, P. What to know about shedding in reptiles. Purdue University College of Veterinary Medicine. vet.purdue.edu
- 4
WikiVet. Snake shedding (last edited 18 August 2012; peer reviewed, awaiting expert review). Citing Mader, D.R. (2005), Reptile Medicine and Surgery. en.wikivet.net
- 5
WikiVet. Snake retained spectacles (last edited 20 August 2010; peer reviewed, awaiting expert review). en.wikivet.net
- 6
Divers, S.J. & Comolli, J.R. (2025). Management and husbandry of reptiles. Merck Veterinary Manual (full review July 2025), section "Humidity for reptiles". merckvetmanual.com
- 7
Wagner, C., Miller, A.K., Engelbrecht, H.M., Greene, H.W. & Alexander, G.J. (2023). When to shed? Patterns and drivers of time to first ecdysis in snakes. Ecology and Evolution 13(8): e10364. doi.org
- 8
Carnes-Mason, M.D. & Beaupre, S.J. (2023). Frequency and timing of ecdysis in free-ranging timber rattlesnakes. Herpetologica 79(4): 207–219. doi.org
- 9
Tsai, T.-S. & Mao, J.-J. (2017). Species identification of shed snake skins in Taiwan and adjacent islands. Zoological Studies 56: 38. doi.org