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2013 Envirothon
Waterstrider
20
Environmental Studies
6th Grade
12/12/2012

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Cards

Term
order?
Definition
hemiptera
Term
family?
Definition
gerridae
Term
number of species in North America?
Definition
47
Term
Also called?
Definition
pond skaters; Jesus bugs because they seem to walk on water
Term
How do they steer?
Definition
with hind legs and unequal strokes of middle legs
Term
describe legs
Definition
three pairs of segmented legs on thorax;
skinny and long to help distribute body weight on water surface
Term
Where are claws?
Definition
2 claws on segmented legs
Term
Gills?
Definition
no
Term
How do they walk on the water?
Definition
middle and hind legs touch water; front legs are held up while middle legs row
Term
Do claws on upper legs break surface tension?
Definition
no
Term
What are at the ends of legs?
Definition
non-wettable hairs
Term
diet?
Definition
terrestrial and aquatic insects, alive and dead
Term
Food for?
Definition
game fish; predaceous water insects
Term
Habitat?
Definition
surface of streams; lakes; ponds; marshes; ditches
Term
movement?
Definition
skate on surface of water
Term
breathing?
Definition
openings in sides of bodies (spiracles); when diving a thin layer of air is trapped on the unwettable hairs
Term
water quality indicator?
Definition
Group II: can exist under a wide range of water quality conditions; a large number indicates Moderate water quality
Term
Eggs?
Definition
loose eggs usually deposited underwater attached to solid objects
Term
When do adults lay eggs?
Definition
spring; develop in summer
Term
When do adults repeat cycle?
Definition
over winter
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