Animal
Spring peeper
The spring peeper is a tiny frog with a dark X on its back. In spring, the males sing "peep, peep" from ponds and wet meadows. It is one of the first sounds of spring!
The spring peeper is a tiny treefrog of eastern North America, about as long as a quarter is wide, with a dark X-shaped mark on its back. Early each spring, hundreds of males gather at small ponds and fill the night with high "peep" calls, one of the first signs that winter is over.
Pseudacris crucifer is a small chorus frog (family Hylidae) found throughout the eastern United States and eastern Canada. Recognized by the X-shaped mark on its back, it breeds in temporary and permanent pools from late winter into early summer, and its loud chorus is a familiar signal of spring. It is abundant, stable and Least Concern.
Photo: Peter Paplanus, CC BY 2.0, via Wikimedia Commons
Meet the spring peeper
The spring peeper is a tiny frog.
It is brown, gray or tan, with a dark X on its back. It has little pads on its toes. In spring, it sings a high "peep!"
The spring peeper is a very small frog: adults are only about 2 to 3 centimeters long. It is usually brown, gray or olive, sometimes almost black, and most have a dark X-shaped mark on the back, although on some the mark is faint or missing.
Peepers are a kind of treefrog. They have small pads on their toes, a pointed snout and smooth skin. They are hard to spot most of the year, but in spring the males' calls give them away.
Pseudacris crucifer is a chorus frog in the treefrog family Hylidae. Adults average 20 to 25 millimeters (Animal Diversity Web), up to about 1.25 inches (32 millimeters) according to Virginia's Department of Wildlife Resources. Dorsal color varies from gray, brown and olive to almost black, occasionally yellowish or reddish, and the belly is pale and unmarked.
The dark X on the back is the classic field mark. The snout is pointed and projects beyond the lower jaw, the skin is smooth, and the toes carry adhesive disks, though smaller than in many other treefrogs. Outside the breeding season it is rarely seen.
Quick facts
- Group
- Amphibian
- Length
- 2 to 3.2 cm
- Lifespan in the wild
- 3 to 4 years
Where it lives
Spring peepers live in the eastern United States and Canada.
They live in damp woods near ponds, wet meadows and ditches. They hide under logs and leaves.
Spring peepers live throughout the eastern United States and eastern Canada, from Labrador and Manitoba south to eastern Texas and Florida. They are missing only from the southern tip of Florida.
They like moist woodlands near small ponds, marshes, swamps, wet meadows and even roadside ditches. They spend most of their time on the ground, hiding under logs, rocks and leaves, and in winter they hibernate under logs or in holes in trees.
The IUCN range covers the eastern United States and adjacent eastern Canada, east to Labrador and west to Manitoba, Minnesota, Iowa, eastern Kansas, Oklahoma and eastern Texas, absent only from southern Florida. A supposed introduction to Cuba has not been confirmed.
It typically lives in moist woodland near breeding pools, mostly on the ground, sheltering under logs, rocks and other cover. Breeding sites include temporary and permanent ponds, marshes, ditches and swamps, especially with standing plants, sticks or debris. Its presence in ditches and artificial ponds suggests some tolerance of habitat change. Animal Diversity Web records hibernation under logs and in tree holes.
Continent
Its habitats
Where can you find this animal?
- Lives here naturally · Countries and seas named by a scientific source
- Sightings recorded · Records of wild sightings (GBIF)
Lives here naturally · Countries and seas named by a scientific source
Moist woodlands, ponds, marshes, swamps, wet meadows and ditches throughout the eastern United States and eastern Canada, from Labrador and Manitoba to eastern Texas and Florida, but not southern Florida. It does not live in the western United States or western Canada.
Places: Canada and United States.
Source: iucn-red-list · checked October 2026
Sightings recorded · Records of wild sightings (GBIF)
Counts of GBIF records of wild observations (human and machine) and preserved specimens. Records include introduced populations, vagrants, escaped or released animals and misidentifications, so a country with records is not necessarily part of the native range.
Wild sightings have been recorded in United States, Canada, Mexico and Namibia.
Source: gbif · checked October 2026
Range maps show where scientists say an animal lives, often country by country. An animal may live in only part of a country shown, and sightings records can include animals that wandered far from home.
What it eats
Spring peepers eat tiny bugs.
They catch ants, beetles, flies and little spiders. Their tadpoles eat tiny green algae.
Spring peepers eat small insects, such as ants, beetles and flies, and spiders. Scientists think they eat whatever small animals are easy to find, rather than choosing special foods.
Young peepers feed mostly in the early morning and late afternoon, and adults from late afternoon into the evening. Their tadpoles graze on algae, bits of dead plants and tiny living things in the water.
The species is insectivorous, taking mainly small insects such as ants, beetles and flies, as well as spiders; food choice appears to depend more on availability and size than on type (Animal Diversity Web). Subadults forage mostly in early morning and late afternoon, adults from late afternoon into evening.
Larvae graze on algae, detritus and microorganisms. As adults, peepers compete with other amphibians and spiders for insects, and both eggs and tadpoles feed many vernal-pool predators such as leeches, large insects and salamander larvae.
Did you know?
Spring peepers are among the first frogs to sing after winter.
Spring peepers are one of the first frogs to start breeding after winter, so their peeps are an early sign of spring.
The species is one of the first anurans to begin breeding after winter hibernation (ADW), from February in Virginia.
Tiny frog, big voice
Like most boy frogs, a peeper puffs up a stretchy pouch under its chin when it sings.
The pouch makes its peep louder. It sings "peep" about once every second.
A male spring peeper calls with a high, clear "peep," repeated about once every second. Like the males of most frogs, he puffs up a stretchy vocal sac under his chin, which makes the call louder. Sometimes peepers trill instead.
Look at the photo: you can see the big dark eye, the pointed snout, the dark stripes on the back and the slender toes with small pads at their tips. Males usually call from low plants beside or standing in the water.
Males produce a high, clear peep repeated at intervals of about a second (Virginia DWR), and males of most frog species amplify such calls with a vocal sac (Australian Museum). Peepers also give trills, which can be mistaken for other chorus frogs.
The toes end in disks, smaller than in many treefrogs, and males usually call from low plants beside or standing in water (IUCN). The X-shaped dorsal mark is sometimes broken into stripes, as in the photo, and coloration varies from gray and brown to olive and almost black.
From egg to frog
Spring peepers lay their eggs in shallow ponds.
Tadpoles hatch, grow legs, lose their tails and hop out as tiny frogs.
After waking from hibernation, males gather at ponds by the hundreds and call. A female chooses a mate, often a bigger male, and lays about 800 to 1,000 eggs in a shallow pond, often where there are plants and sticks in the water.
The eggs hatch in 6 to 12 days. The tadpoles grow for about 45 to 90 days, depending on how long the pond holds water. During metamorphosis their back legs grow first, then their front legs, lungs replace their gills and the tail is slowly absorbed. Then tiny froglets leave the water.
Breeding begins soon after hibernation, from late winter into early summer (February to June in Virginia; March to June in ADW). Hundreds of males gather at small pools and establish small calling territories; females tend to choose larger males. Each female lays 800 to 1,000 eggs in shallow ponds, and embryos and larvae can die in very acidic water (pH 4.2 to 4.5).
Eggs hatch in 6 to 12 days, and the larval stage lasts 45 to 90 days, depending partly on how long vernal pools hold water. Metamorphosis follows the usual frog sequence: hind limbs, then forelimbs, gills replaced by lungs and the tail resorbed (Australian Museum). Animal Diversity Web reports breeding at about three years old.
The spring chorus
Peepers sing together in groups.
They sing most on warm, wet spring nights. Sometimes they sing again in the fall!
Male spring peepers often call in groups of three, taking turns, and the male with the deepest voice usually starts each round. The louder and faster a male peeps, the better his chance of attracting a female.
They call most on warm, wet spring nights, but also in the daytime when it is rainy or cloudy. After the breeding season they go quiet, yet many peepers call again in the fall, when the days grow shorter and cooler.
Calling males often form trios, with the lowest-pitched male usually leading each round; louder, faster calling improves a male's chance of attracting a receptive female (Animal Diversity Web). Choruses peak on warm, wet nights, and peepers also call by day in light rain or cloudy weather.
The species is usually silent by late summer, but Virginia's wildlife agency notes that peepers often start calling again in the fall in response to shorter, cooler days. During breeding, ADW reports small home ranges of about 1.2 to 5.5 meters across and daily movements of about 6 to 40 meters.
Common and secure
There are millions of spring peepers.
They are not in danger. They need wet places and small ponds to lay their eggs.
Spring peepers are listed as least concern. There are thousands of populations and millions of frogs, and their numbers are stable.
Draining wetlands takes away some of their breeding ponds, and they do not do well in cities or areas of heavy farming. But they can even breed in ditches and human-made ponds, so as long as small wet places remain, peepers keep singing every spring.
The IUCN assessed Pseudacris crucifer in 2020 (published 2022) as Least Concern, with thousands of subpopulations, millions of individuals and a stable trend. Wetland drainage is a minor threat; the species does not thrive in heavily urbanized or intensively farmed areas but is moderately adaptable and faces no major global threats.
Eggs and larvae can die in very acidic water (pH 4.2 to 4.5), and the larval period depends on how long pools hold water (ADW). In northern Minnesota successful breeding in acidic bog water is rare or absent.
IUCN Red List
How is the spring peeper doing in the wild?
- Least Concern (this animal)
- Near Threatened
- Vulnerable
- Endangered
- Critically Endangered
- Extinct in the Wild
- Extinct
Least Concern
Not at risk of disappearing from the wild right now.
See the IUCN Red List assessment · The IUCN Red List of Threatened Species 2022.2
Amazing facts
-
Spring peepers are among the first frogs to sing after winter.
Spring peepers are one of the first frogs to start breeding after winter, so their peeps are an early sign of spring.
The species is one of the first anurans to begin breeding after winter hibernation (ADW), from February in Virginia.
-
Peepers sing in groups of three.
Male peepers often sing in trios, and the one with the deepest voice usually starts each round.
Chorusing males typically form trios in which the lowest-pitched male usually leads (ADW).
-
Some peepers sing again in the fall.
Spring peepers often start calling again in the fall, when the days get shorter and cooler.
Autumn calling, apparently triggered by shorter, cooler days, is common in spring peepers (Virginia DWR).
-
Peepers sometimes sing in the daytime when it rains.
Peepers usually sing at night, but on rainy or cloudy days they may call in the daytime too.
Daytime calling occurs during light rain or cloudy weather; choruses are strongest on warm, wet nights (ADW).
Words to know
- chorus
- many animals calling at the same time
- vocal sac
- a stretchy pouch of skin that makes a frog's call louder
- toe pad
- a small disk on the tip of a treefrog's toe
- tadpole
- the young, water-living stage of a frog
- metamorphosis
- a big change in body shape as an animal grows, like a tadpole becoming a frog
- vernal pool
- a small pond that fills in spring and may dry up in summer
Discovery challenge
-
What shape is the dark mark on a spring peeper's back?
What mark do most spring peepers have on their backs?
Which dorsal mark is typical of Pseudacris crucifer?
- A circle
- An X
- A star
Show the answer
An X
Most peepers have a dark X on their back.
Most have a dark X-shaped mark, though on some it is faint or missing.
An X-shaped dark mark, although some individuals have little or no marking.
-
What sound does a spring peeper make?
What does a male spring peeper's call sound like?
How is the spring peeper's advertisement call described?
- A deep moo
- A high peep
- A long howl
Show the answer
A high peep
It says "peep!" That is how it got its name.
A high, clear peep, repeated about once a second.
A distinctive high-pitched peep repeated at intervals of about one second, sometimes with trills.
-
When else do spring peepers sing, besides spring?
At what other time of year do spring peepers often call?
Besides the spring breeding season, when do spring peepers often call?
- In the fall
- Only at noon in midsummer
- Never
Show the answer
In the fall
Many peepers sing again in the fall.
They often call again in the fall, when the days get shorter and cooler.
Virginia DWR notes renewed calling in fall as days become shorter and cooler.
-
Where do spring peepers lay their eggs?
Where do spring peepers lay their eggs?
Where do spring peepers deposit their eggs?
- In small ponds and wetlands
- In the ocean
- In bird nests
Show the answer
In small ponds and wetlands
They lay eggs in small ponds and wet places.
In shallow ponds, marshes and ditches, often among plants and sticks.
In temporary or permanent pools, marshes, ditches and swamps, especially with standing plants and debris.
Places where you might see it
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United States
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Canada
Canada is the second-largest country in the world, stretching across the north of North America from the Atlantic to the Pacific and up into the Arctic. It has the Rocky Mountains, thousands of islands and about 42 million people, who speak English, French and many other languages.
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For parents & teachers
What children will learn
- Identify a spring peeper by its size, X-shaped mark and toe pads.
- Describe how male peepers call and why the chorus matters for finding mates.
- Explain the peeper life cycle and metamorphosis in small ponds.
- Understand why small wetlands and vernal pools are important.
Recommended ages: 3 to 17 · About 15 minutes
Talk about it
- Why might a tiny frog call from a pond together with hundreds of others?
- Why do you think peepers sing in small groups, taking turns?
- What happens to tadpoles if a pond dries up too early?
Try at home or in class
- On a warm, rainy spring evening, go outside with an adult near a pond or wet meadow and listen for peeps. Count how many seconds between peeps.
- Draw a 2.5-centimeter frog on paper, about the width of a quarter, and add the X on its back.
Key vocabulary: chorus, vocal sac, toe pad, tadpole, metamorphosis, vernal pool
Where these facts come from
- The IUCN Red List of Threatened Species , International Union for Conservation of Nature (IUCN terms of use (no redistribution of Red List data or range maps))
- GBIF Backbone Taxonomy and GBIF Occurrence Search , Global Biodiversity Information Facility (CC0 1.0 (backbone); occurrence counts are facts derived from records under CC0, CC BY and CC BY-NC)
- Wikimedia Commons , Wikimedia Foundation (Per file: Public domain, CC0, CC BY or CC BY-SA only (credited on each page))
- Pseudacris crucifer (Spring Peeper), IUCN Red List assessment 2022 , IUCN
- Spring Peeper , Virginia Department of Wildlife Resources
- Pseudacris crucifer (Spring Peeper) , Animal Diversity Web, University of Michigan Museum of Zoology
- Frog life cycle, from egg to adult , Australian Museum
- Wikidata , Wikimedia Foundation (CC0 1.0)
Checked, not yet human-reviewed. Last updated October 27, 2026. Spotted a mistake? Tell us.