Budgerigars – Melopsittacus undulatus
The following posts are by students, about the structual, functional and behavioural features of vertebrates that live in arid environments, that enable them to balance their water requirements.
-Small size of the budgie means that the water requirements are minimal.
-Budgerigars save water by excreting thier waste as nitrogenous waste.
– the budgies will huddle together in dry weather to reduce water loss by reducing thier movement and loss of water through sweat glands.
-they eats seeds with a high water content
– the budgies excrete most of their nitrogenous waste as uric acid which can be contolled as to how dry or wet it is depending on water availability
Euro or wallaroo – Macropus robustus
- have bare muzzles
- have large ears
- can obtain all necessary water from food during dry spells
Flounder – Platichthys flesus
Structural features of the flounder
- The flouder has a a minute body cavity that helps the flouder stay on the bottom of the ocean.
- Lack of air bladder helps the flouder to stay on the bottom of the ocean.
- Eyes on the up side of their body helps to spot pray and predators.
- The top side of the flouders is dark and the bottom side is light.
- They have strong teeth and jaw.
- They have a large mouth.
- Pusterior fin flatter and broader to swim faster and helps to swim on side
Functional features of the flounder
- tolerance for low salinity
- has diluted urine in fresh water
- concntrated urine in salt water
behavioural features of flounder
- Change color of skin to match surroundings to hide from predators
- bury themselves in the sand to hide from predators or to catch pray
- change shape to help find food
- go from river to sea