Brown Bobblehead Bunny

Scanning electron micrograph of stinging hairs on the surface of a nettle leaf. The large stinging hairs (trichomes) are hollow tubes with walls of silica making them into tiny glass needles. The bulb at the base of each hair contains the stinging liquid that includes formic acid, histamine, acetylcholine and 5- hydroxytryptamine (serotonin). The tips of the glassy hairs are very easily broken when brushed, leaving a sharp point, which easily pierces the skin to deliver the sting.
text and photo source

Scientists at Argonne National Laboratory have discovered a way to use sound waves to levitate individual droplets of solutions (Video)

With autumn on the horizon, this graphic looks at the chemicals behind the myriad colours of autumn leaves; bigger version & download here:

Stalked protozoan attached to a filamentous green algae with bacteria on its surface (160x)
Paul W. Johnson
University of Rhode Island, Kingston, Rhode Island, USA
Technique: Nomarski Differential Interference Contrast

Wire-crested Thorntail (Discosura popelairii)
…a  rare and striking species of hummingbird which occurs in Colombia, Ecuador, and Peru. Where it inhabits solely inhabits lowland forests, and is not tolerant of secondary habitats. Like most striking plumaged birds wire-crested thorntails are sexually dimorphic with lacking the long “wire” crests and “thorn” tails of males. In typical humming bird fashion wire-crested thorntails feed on nectar from flowers, but will occasionally take insects as well. 
Currently Discosura popelairii is listed as near threatened by the IUCN, as it faces accelerating threats from deforestation in the Amazon Basin. 
Animalia-Chordata-Aves-Apodiformes-Trochilidae-Discosura-D. popelairii
Image: Bill Bouton

Dr. David Maitland
Feltwell, Norfolk, United Kingdom Specimen: Cocoa nut palm (Cocos comosa) stem with xylem vessel “eyes” in vascular bundle “faces.” Technique: Differential interference contrast

Hawaiian baby woodrose. Argyreia nervosa

The scientific name of this flower is Calceolaria Uniflora or Darwin’s Slipper Flower, discovered by Charles Darwin in his voyage around South America.
But I am sure you could find another nice name based on its appearance
via Green Renaissance

From Bug Addiction - Confessions of a Bug Addict
“This morning I found this awesome Giant Leopard moth on a wall beneath a light. When they are disturbed they raise the body, lift the wings and show the stunning bright colors of the thorax and abdomen. I’m sure like other Arctiinae (Tiger and Lichen moths), these colors scream “I sequester nasty chemicals and if you eat me, you will get sick”!”