The Outer Beauty of Arthropods
Emily Clements-Mitcham-PAP Bio-Period 2
Crayfish are found almost exclusively in freshwater, although they are found in North America, Europe, New Zealand, and East Asia. Their eyes are on stalks, an adaptation allowing for more range of sight. They mostly eat algae, snails, tadpoles, worms, insect larvae, and even sometimes dead fish or salmon eggs. This makes them omnivorous, and at least secondary consumers. Their main predators are raccoons, opossums, muskrats, and snakes.
Grasshoppers are primary consumers, or herbivores, usually consuming grasses and other, similar plants. This means that they are prey to many animals, and predators to none. Many birds, lizards, rodents, and spiders eat grasshoppers. They live in plains or flat areas similar to plains with many (usually tall) grasses and plants. Their powerful and long hind legs allow them to jump from blade of grass to blade of grass quickly to avoid predators. Another adaptation is some grasshoppers' ability to spew a brown, bitter liquid when they are being threatened.
The above pictures show where each part of the integumentary system is and what they look like.
Taxonomy of Phylum Arthropoda
Species: C. robustus
Grasshopper (or Melanoplus differentialis)
Species: M. differentialis
In general, the interactions between these animals and humans are negative (for the animal that is, not the human).
Crayfish are a common food for many people, especially people who live near swampy areas, considering that is where crayfish are usually found. This obviously lowers the population, like with the perch, but, again, like the perch, it isn't enough to make a dent in the population.
Grasshoppers usually don't directly interact with humans. They way they are affected is mostly by pesticides on crops. Grasshoppers may land on or try to eat said crops and get sick, die, or make the animal that eats them get sick or die.
- Crayfish only live for about 2 years, so they go through stages of life rapidly
- There are about 500 known species of crayfish, and over half of those live in North America
- Crayfish can be brown/red, red, blue, and white
- Grasshoppers can jump up to 20 times the length of their bodies
- They have 5 eyes, but have no ears
- There are over 18,000 known species of grasshopper
- They can make "music" with their hind legs/wings