# Pumpkin Gall Wasp (*Dryocosmus minusculus*)

The Pumpkin Gall Wasp is a tiny insect that makes little round bumps, called galls, on oak leaves. These galls look like small pumpkins and are home to the wasp's babies!

- **Category:** [Insects](https://www.snappit.app/explore/categories/insect)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Habitat:** Forests

![Pumpkin Gall Wasp](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Dryocosmus_minusculus.jpg&width=800)

Photo: Jesse Rorabaugh, CC0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Dryocosmus_minusculus.jpg)

## Appearance

The Pumpkin Gall Wasp is a tiny, dark-bodied insect, typically black or dark brown, with a shiny exoskeleton and yellowish-brown legs. It has a rounded abdomen and short antennae, differentiating it by its minute size and often obscure presence without its distinctive gall.

## Taxonomy

- **Kingdom:** Animalia
- **Phylum:** Arthropoda
- **Class:** Insecta
- **Order:** Hymenoptera
- **Family:** Cynipidae
- **Genus:** Dryocosmus

## Interesting facts

- Many Pumpkin Gall Wasps are all female; males are super rare or not found at all!
- Some galls can look exactly like miniature pumpkins, even turning orange when mature!
- Sometimes, other insects called 'inquilines' sneak into the gall to share its shelter!
- The adult wasp that makes the gall is many times smaller than the 'pumpkin' it creates.

## Special abilities

- **Gall Architect:** Pumpkin Gall Wasp can chemically induce a pumpkin-shaped gall on oak trees that provides shelter and food for its developing larva.
- **Chemical Manipulator:** Pumpkin Gall Wasp has the power to inject plant hormones into oak leaves, tricking the tree into growing a safe, nutritious home.
- **Parthenogenesis Power:** Pumpkin Gall Wasp can reproduce without a male, allowing females to lay eggs that develop into new females by themselves.

## Measurements & details

- **Wingspan:** 4-6 mm
- **Size:** 2-3 mm
- **Lifespan:** 7-14 days
- **Leg Count:** 6

## Diet & Feeding

As larvae, they eat the inside of the plant gall; adults generally do not feed.

- **Age differences:** Adults do not feed, while larvae consume the nutritious inner tissue of the plant gall they create.
- **Primary Foods:** Oak leaf tissue, Oak stem tissue, Gall tissue

## Ecological connections

- **Depends on:** California Live Oak (*Quercus agrifolia*) — The wasp larvae develop entirely inside galls on its leaves.
- **Depends on:** [Valley Oak](https://www.snappit.app/explore/valley-oak) (*Quercus lobata*) — Forms distinct pumpkin galls on the leaves and stems of this oak.
- **Parasitizes:** Splendid Torymid Wasp (*Torymus splendidus*) — Lays its eggs inside the gall, and its larva eats the wasp larva.
- **Eaten by:** [Mountain Chickadee](https://www.snappit.app/explore/mountain-chickadee) (*Poecile gambeli*) — Birds may peck open galls to eat the developing wasp larvae.

## Traits

- [Solitary](https://www.snappit.app/explore/traits/solitary): Solitary animals live alone for most of their lives, only interacting with others for mating or parental care.
- [Herbivorous](https://www.snappit.app/explore/traits/herbivorous): This trait characterizes organisms whose diet consists entirely or primarily of plant material.
- [Forest](https://www.snappit.app/explore/traits/forest): Forest habitats are terrestrial environments dominated by dense tree cover, supporting a high diversity of plant and animal life.
- [Keystone Species](https://www.snappit.app/explore/traits/keystone-species): Describes a species whose presence and role have a disproportionately large effect on its environment.
- [Miniature](https://www.snappit.app/explore/traits/miniature): Pertaining to species that are significantly smaller than typical or average for their kind.
- [Pollinator](https://www.snappit.app/explore/traits/pollinator): Describes organisms that transfer pollen, enabling the fertilization and reproduction of plants.

## Collections

- [Insects](https://www.snappit.app/explore/collections/insects)

## Safety

**Danger:** 1/5 · Very low

Don't touch galls on trees; they are homes for tiny insects!

## Frequently Asked Questions

### How to identify Pumpkin Gall Wasp?

Compare the antennae, wings, waist, body hair and legs. Yellow and black stripes show up on bees, wasps and harmless mimics alike. Bee & Wasp Identifier: upload a photo and compare the visible details.

### What is Pumpkin Gall Wasp's wingspan?

4-6 mm

### How big is Pumpkin Gall Wasp?

2-3 mm

### How long does Pumpkin Gall Wasp live?

7-14 days

### What does Pumpkin Gall Wasp eat?

As larvae, they eat the inside of the plant gall; adults generally do not feed.

### Where is Pumpkin Gall Wasp usually found?

Forests

### How many legs does Pumpkin Gall Wasp have?

6

## Where to spot

- [Hellyer County Park](https://www.snappit.app/guides/places/hellyer-county-park) — California, US · Park
- [Mission Hills Park](https://www.snappit.app/guides/places/mission-hills-park) — California, US · Park

## More Insects

- [Common Eastern Bumble Bee](https://www.snappit.app/explore/common-eastern-bumble-bee) (*Bombus impatiens*)
- [Spotted Lanternfly](https://www.snappit.app/explore/spotted-lanternfly) (*Lycorma delicatula*)
- [Brown-belted Bumble Bee](https://www.snappit.app/explore/brown-belted-bumble-bee) (*Bombus griseocollis*)
- [Eastern Carpenter Bee](https://www.snappit.app/explore/eastern-carpenter-bee) (*Xylocopa virginica*)

---

Source: [Pumpkin Gall Wasp: Facts & Places to See — Snappit](https://www.snappit.app/explore/pumpkin-gall-wasp)