Protorhaca staminea 6. Mya arenaria 7. Tresus capax 8. Callianassa californiensis 9. Pisaster brevispinus Birds using the mudflat at low tide consist of various shorebirds whose bills are adapted to reaching to a specific depth.
Resource partitioning is where the birds divide up their habitat by feeding on different organisms.
Diving birds like cormorants and surf scoters use the mud flats at high tide. Salt marshes are found above the mudflats. They are covered only by high tides. The plants that have adapted to living in these areas are salt-tolerant plants like pickleweed Salicornia and arrowgrass, Triglochin maritimum . Surrounding Yaquina Bay in the past was an upland forest made up of western hemlocks,, Tsuga heterophylla , Douglas firs, Pseudotsuga mensiesii , western red cedar, Thuja plicata , red alder, Alnus rubra , salal, Gaultheria shallon , evergreen huckleberry, Vaccinium ovatum and western rhododendron, Rhododendron macrophyllum and others.