---
title: "Brazilian Wandering Spider vs Sydney Funnel-Web Spider"
description: "Who would win, Brazilian Wandering Spider or Sydney Funnel-Web Spider? Too close to call: our 3-round simulation gives 49% to 51%."
image: "https://animaltracks.wiki/icon-512.png"
---

# Brazilian Wandering Spider vs Sydney Funnel-Web Spider: Who Would Win?

Brazilian Wandering Spider vs Sydney Funnel-Web Spider is too close to call. Our 3-round simulation gives Brazilian Wandering Spider a 49% chance and Sydney Funnel-Web Spider 51%, which is not enough for either to claim the win.

The simulation puts both animals on neutral ground. In the wild, terrain, the size of the individual animals and plain luck would all change the result.

## Verdict: Too close to call
- **Win probability**: Brazilian Wandering Spider 49%, Sydney Funnel-Web Spider 51%
- **Decisive weapon**: Evenly Matched Evolutionary Countermeasures

### Round 1: Opening Clash & Speed

Brazilian Wandering Spider seizes the opening initiative with superior agility (44 vs 45), circling Sydney Funnel-Web Spider and striking from an advantageous flank.

### Round 2: Clash of Superpowers

Sydney Funnel-Web Spider detonates its biological specialty: Robustoxin (delta-atracotoxin-Ar1), a 42-amino-acid peptide in male venom that stops some sodium channels in nerve cells from switching off properly. Its toxin family likely evolved to deter vertebrate predators such as bandicoots, birds and lizards, but robustoxin severely affects the nervous systems of humans and monkeys. The sheer destructive payload overcomes Brazilian Wandering Spider's 17 armor rating.

### Round 3: Final Resolution

After three grueling rounds, neither creature can establish a decisive edge. Both combatants retreat to neutral ground with full mutual respect.

## Fighter 1: Brazilian Wandering Spider (*Phoneutria nigriventer*)
- **Superpower**: Venom peptides that jam voltage-gated sodium and calcium channels and the nicotinic acetylcholine receptor
- **Danger Level**: Deadly
- **Conservation Status**: Not Evaluated
- **Habitat**: Forests of central and south-eastern Brazil, Paraguay, northern Argentina, and Uruguay, also banana plantations and buildings
- **Musical Match**: Jorge Ben Jor (Classic Funk, Soul & Disco)
- **Full Dossier**: [Read Brazilian Wandering Spider Profile](https://animaltracks.wiki/animals/brazilian-wandering-spider/)

## Fighter 2: Sydney Funnel-Web Spider (*Atrax robustus*)
- **Superpower**: Robustoxin (delta-atracotoxin-Ar1), a 42-amino-acid peptide in male venom that stops some sodium channels in nerve cells from switching off properly. Its toxin family likely evolved to deter vertebrate predators such as bandicoots, birds and lizards, but robustoxin severely affects the nervous systems of humans and monkeys.
- **Danger Level**: Deadly
- **Conservation Status**: Not Evaluated
- **Habitat**: Shady gullies, forest, woodland and bushy suburbs across the Sydney basin, from the Central Coast south to the Georges River and west to Baulkham Hills
- **Musical Match**: Joan Jett & the Blackhearts (Classic Hard Rock & Southern Blues)
- **Full Dossier**: [Read Sydney Funnel-Web Spider Profile](https://animaltracks.wiki/animals/sydney-funnel-web-spider/)

## Biological Matchup Context
When contrasting Brazilian Wandering Spider against Sydney Funnel-Web Spider, tactical victory depends on physiological engagement range, strike speed, armor density, and chemical or physical defense mechanisms:
- **Brazilian Wandering Spider**: A web-less wandering spider of south-eastern South America that hunts among the vegetation after dark, throws its front legs up when threatened, and carries venom packed with peptides that jam ion channels.
- **Sydney Funnel-Web Spider**: Male venom carries a nerve toxin that likely evolved to deter bandicoots and birds, and is lethal to humans by unfortunate coincidence.

Pick your own matchup in the interactive arena: [Battle Arena](https://animaltracks.wiki/compare/brazilian-wandering-spider-vs-sydney-funnel-web-spider/)

> The Battle Arena is an algorithmic thought experiment for education and entertainment. Never provoke, fight, or disturb animals in the wild.

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