Lasionycteris noctivagans
Silhouette: CJ Campbell · PhyloPic
In 3 days ~10% in a week ~30%
The silver-haired bat (Lasionycteris noctivagans) is a solitary migratory species of vesper bat in the family Vespertilionidae and the only member of the genus Lasionycteris. The species name translates as night-wandering, referring to the nocturnal behavior of bats.
This medium-sized bat is predominantly black (including the wings, ears, interfemoral membrane, and fur) with white-tipped hairs. The basal upper half of its tail membrane is densely furred. This gives the bat a frosted appearance and its common namesake. This species has a flattened skull with a broad rostrum. This species weighs around 8–12 g, has a total length of ~100 mm, a tail length of 40 mm, and a forearm length of 37–44 mm.
Lasionycteris noctivagans is found in Bermuda, Canada, Mexico, and the United States. This forest inhabitant is known to occur from southeastern Alaska in summer to northeastern Mexico in winter and is found in arid habitats at low elevations during seasonal migrations. In Missouri, reproduction occurs in the northern dissected plains region, but reproductive females are believed to be absent from the southern Ozark highlands... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Point Pelee National Park | 🇨🇦 Canada |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chicago | 🇺🇸 United States | |
| 2 | Baltimore | 🇺🇸 United States | |
| 3 | Calgary | 🇨🇦 Canada | |
| 4 | New York City | 🇺🇸 United States | |
| 5 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 6 | Washington | 🇺🇸 United States | |
| 7 | Toronto | 🇨🇦 Canada | |
| 8 | San Diego | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | National Aquarium | 🇺🇸 United States | |
| 2 | Mountainaire Avian Rescue Society | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Silver-haired Bat sighting in Baltimore on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 16th most-seen of the 18 mammals we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
January, March and October–November
In those months about 10% of wildlife watchers report a Silver-haired Bat in Baltimore on a given day, against under 5% in February, April–September and December, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Silver-haired Bat sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 8
Of the 8 cities where we can rate Silver-haired Bat sightings, Baltimore ranks 2nd at under 5%. The best odds are in Chicago (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Silver-haired Bat is recorded against all the mammals logged in Baltimore (8 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
