Description of the Banana Spider
1. Banana Spider in its web
2. Close-up of body
3. Spider with visible leg span
Key Characteristics
- Bright colors (yellow, black, red)
- Long, slender, banded legs
- Large, golden silk webs
Size
- Females: 1-3 inches
- Males: 0.1-0.3 inches
Weight
- Females: 1-3 grams
- Males: <0.5 grams
Life Span
- Females: 1-2 years
- Males: A few months
Differences Between Males and Females
- Females are larger and more colorful, build webs
- Males are smaller, less colorful, do not build webs
Evolution of the Banana Spider
All Subspecies
- Nephila clavipes clavipes
- Nephila clavipes fasciculata
- Nephila clavipes nordenskioeldii
How long has this species been in existence
- Estimated to have been in existence for over 165 million years, dating back to the Jurassic period.
Closest living relative to this species
- Nephila pilipes (another species of golden orb-weaver spider).
Three ancestors of this species:
- Araneomorph spiders: Early web-building spiders from the Triassic period.
- Mesothelae: Primitive spiders with segmented abdomens from the Carboniferous period.
- Uraraneida: Extinct spider-like arachnids with spinnerets, dating back to the Devonian period.
Taxonomy
Kingdom:Animalia
- Multicellular, animals
- Phylum: Arthropoda
- Exoskeleton, segmented
- Class: Arachnida
- Eight legs
- Order: Araneae
- Web spinners
- Family: Araneidae
- Orb weavers
- Genus and Species: Nephila clavipesi
- Banana Spider
Ecology and Habitat
- Habitat:
- Forests
- Gardens
- Role in Ecosystem:
- Builds large webs to catch prey
- Helps control insect populations
- Provides food for birds and other predators
Banana Spider Habitat
Rainfall
- They live in tropical and subtropical areas with 60 to 100 inches of rainfall each year.
Plants
- Dense forests, jungles, and areas with lots of trees and shrubs are common.
Animals
- They coexist with insects (their main food), birds, small mammals, and other spiders.
Temperature
- They thrive in warm climates, between 70°F to 90°F they prefer humid environments.
Terrain
- They can be found in forests, grasslands, wetlands, and gardens, building large webs in open spaces.
Distribution
- Continents found:
- North America
- South America
- Asia
- Africa
- Australia
- Invasive: Not considered invasive
Diet
What It Eats
- Banana spiders mainly eat insects like flies, beetles, and mosquitoes.
How Often
- They eat whenever they catch prey, often consuming multiple insects daily.
How They Get Food
- They trap insects in their large, sticky webs and then immobilize and eat them.
Special Foods
- Occasionally, they might eat small frogs or lizards caught in their webs.
Social Structure
- Live in packs or solo: They live alone.
- Roles within community:They don't have specific roles since they are solitary.
- Male or Female led groups:They don't form groups.
- Individuals that make up the group:They are usually by themselves.
- How do they interact with each other:They mostly interact only during mating.
Reproduction
- How often do they mate: Typically once per year
- How many mates do they have: Generally one mate
- Time of year for mating: Late summer to early fall
- Mating rituals: Males vibrate the female's web to signal their intention to mate
- Number of offspring produced at a time: Several hundred eggs in a single egg sac
- Any unique characteristics of their mating: Males are significantly smaller than females and may be at risk of being cannibalized by the female after mating
Development
- Stages of development:Egg, larva, juvenile (nymph), adult
- How old before sexual maturity: 1-2 years
- Activities and environment of stages:
- Egg: Inside an egg sac, protected in the web
- Larva: Hatch and stay in the sac for a while
- Juvenile (nymph): Leave the sac, build small webs, catch small prey
- Adult:Fully grown, can mate, build larger webs
- Difference between males and females:
- Males: Smaller, mature faster, mainly look for a mate
- Females: Larger, live longer, build webs, and lay eggs
Causes of Death
- Predation: Eaten by birds, lizards, or larger insects
- Sexual Competition:Males may die after mating or be eaten by females
- Disease:Can get fungal or bacterial infections
- Other causes:Extreme weather or habitat destruction
Competition
- Inter-species (within the species) Males compete for mating opportunities with females
- Intra-species (with other species):Compete with other spiders and insects for food and web-building spaces
- What do they compete over:Food (insects) and places to build webs
- Effect of invasive species:Invasive species can take over their food sources and habitats, leading to fewer banana spiders
IUCN Rating
- What is the rating? Least Concern, meaning they're not currently threatened
- Population:Generally steady
- Population Trend:Staying about the same or slightly increasing
Impact of Humans
- What impacts have occurred:Their homes being destroyed, pollution, and accidentally getting hurt by humans
- Potential Future impacts:More habitat loss because of building and climate change affecting where they live
- How long have humans been interacting with species:Since people started living where they do, for thousands of years
- Efforts being made to minimize impacts: Trying to save their homes, teaching people about why they're important, and reducing pollution