Photo: Spiders Make Stronger Silk to Catch Bigger Prey



A black widow spider crawls on a leaf in Sand Hills, North Carolina.

Common house spiders—Achaearanea tepidariorum—were found to produce stronger silk to catch larger prey, scientists said in August 2008.

The finding suggests some spiders determine when to save energy by producing weaker silk for smaller prey.

Photograph by George Grall/NGS


NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.