A set of six detailed pencil sketches in a field notebook style illustrating ecological concepts: soil profile, lichen patches on a tree, sparrows foraging, understory plants, and a pond habitat.

Create five detailed pencil sketches in a field notebook style for a Focal Habitat Assessment of an urban park: (1) a vertical cross-section of a soil profile showing 2 cm thick leaf litter (brown, decaying leaves and twigs) on top, 10 cm moist topsoil (dark brown, loose, crumbly, with a visible earthworm burrowing) in the middle, and compacted subsoil (dry, light brown, like a footpath) at the bottom, labeled with arrows and notes like 'Moist under tree' and 'Dry footpath,' including a small oak tree base in the background; (2) a deciduous tree trunk (oak or maple) with rough bark partially covered (10-20%) by pale green and gray lichens on the shaded side, shown as patchy, textured growth with hanging strands, labeled 'Lichen patches' and 'Shaded bark,' with faint park scenery in the background and annotations like 'Mutualism for moisture'; (3) sparrows interacting with insects, depicting four small brown sparrows (striped, about 12 cm long) hopping on the ground—one chasing another, two pecking at soil for seeds/insects—alongside a black ant trail moving along the dirt, with simple arrows for movement and labels 'Sparrow foraging' and 'Ant trail,' set against a grassy park background; (4) understory plants including dandelion (yellow flower, toothed leaves), white clover (trifoliate leaves), plantain (broad leaves), and a small weed with yellow petals, arranged in a grassy patch with labels for each species and notes like 'Non-grass diversity' and 'In grassy area,' with a See more