Tree Leaf Identification Key – Online Shape, Margin, Arrangement
Select leaf characteristics (simple/compound, smooth/toothed) to identify common North American trees.
UD5 Toolkit
Select leaf characteristics (simple/compound, smooth/toothed) to identify common North American trees.
Click on leaf symptoms (yellow, brown tips, spots) to diagnose common houseplant issues and solutions.
Answer yes/no questions about color, hardness, streak, luster to narrow down common rocks and minerals.
Identify common invertebrate fossils (ammonite, trilobite, brachiopod) from sketches. Amateur paleontology.
Answer simple questions (color, size, beak shape) to narrow down common North American backyard birds. No photo needed.