- This family is known
as the Cruisers. They fly over streams and rivers, generally cruising right
down the middle of the stream at high speed. They cruise in the same way over
roads. Some species also occasionally occur at lakes.
- In North America, this
family contains nine species in two genera. Only one species lives in Idaho.
- These are large dragonflies,
somewhat similar to Darners at first glance. Unlike the Darners, however,
the eyes are green and just barely meet at the top of the head.
- The females lay eggs
(oviposit) by dipping the tip of the abdomen in the water while flying just
above the surface. The females oviposit without a male in attendance.
- The naiads of these
dragonflies are usually found in streams and rivers, though some species do
occur in lakes where there is some water movement.
- The naiads are almost
round with very long legs. They sit in the debris on the bottom of streams
and lakes and wait for prey to come to them.
- The naiads emerge at
night. Emergence is a slow process and the newly emerged adults are very vulnerable
to predators. They usually crawl vertically on to vegetation and emerge while
These are large dragonflies
with clear wings. Their coloration is yellow and black with a metallic luster
and green eyes. They have slightly widened segments at the end of their abdomens
or "clubs". These are most prominent in the males.
Western river Cruiser
Written by Mark Lung and Stefan
Page design by Ean Harker 2001.
Original images provided by Dennis Paulson,©2001.