| Term | Definition |
|---|---|
| Deforestation | (verb) the act of cutting down trees in forests and rainforests. This is usually done by logging and/or burning the trees, turning the forest into farmlands and savannas. |
| Depth Perception | (noun) the ability to judge the distance of objects and the spatial relationship of objects at different distances. |
| Dimorphic | (adj) occurring in two distinct forms with visual differences between the males and the females. Dimorphic characteristics in parrots may be color, size or distinct markings. |
| Droppings | (noun) term for the waste matter of birds containing both feces and urine. |
