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 8 years ago

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

AndreaLim 8 years ago

What an unusual spider. Great spotting!

gully.moy 8 years ago

Crazy stuff!

ToshimiDowaki 8 years ago

Wonderful SOTD!

Jacob Gorneau
Jacob Gorneau 8 years ago

A belated congratulations on a spectacular spotting of the day!

Tom15 8 years ago

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

MayraSpringmann 8 years ago


Carol Snow Milne 2
Carol Snow Milne 2 8 years ago

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

alicelongmartin 8 years ago


Fyn  Kynd
Fyn Kynd 8 years ago

Awesome spotting, congratulations!

tibiprada 8 years ago

♥ ♥ ♥

Utheowyn 8 years ago

wonderful creature...thanks for sharing, Sinobug!

ceherzog 8 years ago

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

mr.j.drake 8 years ago

you learn something new everyday !

Sachin Zaveri
Sachin Zaveri 8 years ago

Congratulations, Sinobug,,

Adarsha B S
Adarsha B S 8 years ago

Spectaclar! Congos!

Scott Frazier
Scott Frazier 8 years ago

Congratulations, what a fantastic SOTD!

Atul 8 years ago

Superb Spotting ! congratulations :)

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

Josh Asel
Josh Asel 8 years ago

Fantastic spotting well deserved congrats!

Jolly Ibañez
Jolly Ibañez 8 years ago

Congratulations John

Maria dB
Maria dB 8 years ago

Congratulations on your SOTD!

Congratulations on this awe inspiring SotD !

NuwanChathuranga 8 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

Noah Guardians
Noah Sponsors
join Project Noah Team

Join the Project Noah Team