Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Long-horned Orb-weaver Spider

Macracantha arcuata


As members of the orb-weaver family of spiders, these amazing creatures build the typical circular web of their cousins across pathways so you can walk into them in the dark. The purpose of the disproportionately long body horns however remains a mystery. This is one of the larger individuals I have come across; each horn is about 45mm in length.

1 Species ID Suggestions

Spiny orb weaver
Micrathena cyanospina ?

Sign in to suggest organism ID

44 Comments (1–25)

GustavoMorejon 10 years ago

It looks like Micrathena cyanospina, but this specie is supposed to live in South America ...

AndreaLim 10 years ago

What an unusual spider. Great spotting!

gully.moy 10 years ago

Crazy stuff!

ToshimiDowaki 10 years ago

Wonderful SOTD!

Jacob Gorneau
Jacob Gorneau 10 years ago

A belated congratulations on a spectacular spotting of the day!

Tom15 10 years ago

Congratulations, this incredible spider photo is well deserving of SOTD!!!

MayraSpringmann 10 years ago


Carol Snow Milne 2
Carol Snow Milne 2 10 years ago

Not surprised by your SOTD. Awesome and congratulations! Much-deserved. Very amazing spider.

alicelongmartin 10 years ago


Fyn  Kynd
Fyn Kynd 10 years ago

Awesome spotting, congratulations!

tibiprada 10 years ago

♥ ♥ ♥

Utheowyn 10 years ago

wonderful creature...thanks for sharing, Sinobug!

ceherzog 10 years ago

Wow! That's a sight to behold...congrats

mr.j.drake 10 years ago

you learn something new everyday !

Sachin Zaveri
Sachin Zaveri 10 years ago

Congratulations, Sinobug,,

Adarsha B S
Adarsha B S 10 years ago

Spectaclar! Congos!

Scott Frazier
Scott Frazier 10 years ago

Congratulations, what a fantastic SOTD!

Atul 10 years ago

Superb Spotting ! congratulations :)

Incredible spider, beautiful!! Congratulation on the SOTD, Sinobug!

Josh Asel
Josh Asel 10 years ago

Fantastic spotting well deserved congrats!

Jolly Ibañez
Jolly Ibañez 10 years ago

Congratulations John

Maria dB
Maria dB 10 years ago

Congratulations on your SOTD!

Reza Hashemizadeh
Reza Hashemizadeh 10 years ago

Congratulations on this awe inspiring SotD !

NuwanChathuranga 10 years ago

Congrats !!

Beautiful capture Sinobug,congrats on the SOTD,thanks for sharing

Spotted by

普洱市, 云南省, Paracel Islands

Spotted on Feb 16, 2013
Submitted on Feb 20, 2013

Related Spottings

Curved Spiny Spider Curved Spiny Orbweaver Spiny orb-weaver spider Spiny orb-weaver spider

Nearby Spottings

June Beetle Spotting Spotting Blue Admiral
Noah Guardians
Noah Sponsors
join Project Noah Team

Join the Project Noah Team