I traveled to the southeast region of Arkansas with a conservation biologist with the Arkansas Natural Heritage Commission in search of the Henslow’s Sparrow.
The biologist was studying the presence of the Henslow’s Sparrow at Warren Prairie Natural Area. Warren Prairie consists of salt slicks, saline barrens, Delta post oak flat woods, mound woodlands, pine flat woods and woodlands, and bottomland hardwood forest communities, according to ANHC. It is one of the few consistent places to find the declining Henslow’s Sparrows, which prefers thick, weedy grasslands and wetlands.
We went back and forth a flooded grassland to flush the Henslow’s sparrows. According to the biologist, these sparrows are rarely vocal so the best chance to find them is when they are flushed from the ground to nearby trees.
Warren Prairie is also home to several colonies of Red-cockaded Woodpeckers, which the Continental Concern Score indicates is a species of highest conservation concern. Our first stop at Warren Prairie had us watching a Red-cockaded Woodpecker busy pecking at a tree just near a cavity.
The Red-cockaded Woodpecker used to fairly common in the southern United States, but the species is now endangered and only remain mostly in large populations on federal lands due to their dependance of old-growth southern pine forests for food and habitat.
They live in family groups that work together to dig cavities and raise young, according to AllAboutBirds.org. Breeding pairs are monogamous and often stay together for life. They live in family groups of two to five adults usually with only one female. Females will leave during their first winter. It’s neat: sons from previous breeding seasons typically stay with the parents to help incubate, brood and feed the young. When the parents finally leave, these sons will then take over the cavity and the tradition continues.
For roosts and nests, they only live in live pines, preferably ones infected with red heart fungus. The fungus softens the wood making the work of creating the cavity easier. AllAboutBirds.org reports it may take two years or more for the Red-cockaded Woodpecker to completely dig out one cavity. Due to this, family groups rarely colonize new areas.
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