Lasionycteris noctivagans
Silhouette: CJ Campbell · PhyloPic
In 3 days ~10%
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 San Diego on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 23rd most-seen of the 26 mammals we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Silver-haired Bat in San Diego on a given day, so our monthly data shows no clear season.
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.
8th of 8
Of the 8 cities where we can rate Silver-haired Bat sightings, San Diego ranks 8th at under 5%. The best odds are in Chicago (United States, about 10%), Baltimore (United States, under 5%) and Calgary (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Silver-haired Bat is recorded against all the mammals logged in San Diego (6 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.
