Almond scented millipede 
Harpaphe haydeniana haydeniana 
(not a true insect)
Order: Myriapoda
Habitat: Forest
montane, lowland
Take a stroll in Olympic's forests and you will undoubtedly find one of these creatures foraging atop the forest floor. Some call it "night-train" because of the yellow spots along the side of its body that float along like brightly-lit windows on a train.  

What is a millipede? 
Millipedes are very ancient creatures, among the first land animals to crawl on land. They are Myriapods, having a short head, long segmented body and many paired legs. Belonging to the class Diplopoda, millipedes can be recognized by having two pairs of legs on each body segment. True insects have only 3 segments--a head, thorax, and abdomen--but millipedes can have up to 20.   

Habitat and Lifecycle 
The almond-scented millipede lives in Olympic's moist forests and their range extends from California to Alaska. A millipede moves though the leafy layer holding its slightly-curled antennae in front of it to feel and smell the way. Its many legs are needed step 
over and around the leafy particles and its body is flattened so it can fit into cracks and crevices on the forest floor. As a decomposer it chews up needles and other dead plant material and recycles it into soil.  

In the spring mating occurs and several hundred tiny eggs are laid in soil or duff. When the young hatch, they are paler in color than mature adults. Each time they molt, they add a segment and become a darker shade of gray and have brighter yellow spots. Once are they are about 4 to 5 cm long, with their black and yellow colors, they are mature and are able to reproduce. By now, they have about 20 segments and females have 31 pairs of legs, while males have only 30. The missing pair of legs on the male is modified into a gonopod for sperm transfer. Yellow-spotted millipedes live to about 2 to 3 years of age. 
Survival Strategies 

    1. Almond-scented millipedes use their scent as a defense mechanism. When predators such as a beetles or shrews near, they release their cyanide scent which is toxic to their predators in very small dosages. Despite the poison, some beetles manage to eat almond-scented millipedes.   
    2. They also protect themselves from being eaten by curling up into a tight ball, resembling a snail with a hard exo-skeleton.  
    3. The bright yellow spots on a black background serve to warn potential predators of their poisons.