The riparian area, which surrounds the river and streams, is usually high in species richness for both plants and animals because all living things need water. The bird boxes located at the crest of the hill before the trail drops down towards the river are for the Eastern Bluebirds and Tree Swallows. The decline in Eastern Bluebird population is due to loss of habitat and competition with other birds. Because bluebirds prefer quiet pastureland and fields, the MFCA provides them an excellent habitat. Vernal pools, temporary bodies of water that provide breeding habitat for amphibians and invertebrates and do not support fish, can also be found during the spring season.
Wetlands add significantly to the diversity of wildlife habitat and food sources.
They also provide for flood control and for the protection and continuance of water supply and quality by filtering pollutants. Recreational Use MFCA provides residents opportunities for walking, wildlife observation, scenic enjoyment, and access to the Merrimack River. Non-motorized use of this area is essential to prevent erosion, wetland degradation, and wildlife disturbance especially for wintering bald eagles, which are especially sensitive to human disturbances.