Big brown bats carry a NatureServe S3 vulnerable rank in Louisiana, a more cautious read than the species gets in many other states, where it’s often rated secure; Grant Parish, which takes in part of Kisatchie National Forest, holds 49 of the state’s 111 records for a bat that regularly roosts in buildings as well as tree cavities.
Records are lumpy across the year, peaking at 33 in July and 19 in August with a smaller winter rise of 17 in January, while May, June, September, and October hold one or two each. With 108 of the 111 records coming through GBIF, that calendar more likely tracks when bat surveys ran than any real swing in the bats’ own activity.
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