Lutreolina crassicaudata
In 3 days ~10% in a week ~20%
The big lutrine opossum (Lutreolina crassicaudata), also called little water opossum, thick-tailed opossum and coligrueso, is a long-tailed, otter-like mammal native to grasslands of South America. It generally lives near water and is active at night, dawn or dusk. It eats mice, insects and crabs. Like all opossums, it is a marsupial and carries its young in a pouch.
The big lutrine opossum ("lutrine" means "otter-like" and "crass" meaning "thick, fat" and "cauda" meaning "tail") is a very peculiar opossum, having a long weasel-like body, short legs, small rounded ears, and dense reddish or yellowish fur. Nocturnal and crepuscular, they generally live in grasslands and savannas near water. They are terrestrial but are excellent swimmers and climbers.
The big lutrine opossum is distributed in Brazil, Argentina, Bolivia, Uruguay, Paraguay, Colombia and Guyana. Populations in the two last countries are isolated from the populations of all the other countries. It can be found in grasslands, savanna grassland, and gallery woodlands with permanent water bodies, in marshy or riparian habitats.
The big lutrine opossum... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Buenos Aires | 🇦🇷 Argentina |
Rare
Under 5% of wildlife watchers report a Little Water Opossum sighting in Buenos Aires on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 9th most-seen of the 15 mammals we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
June and September
In those months about 10% of wildlife watchers report a Little Water Opossum in Buenos Aires on a given day, against under 5% in July–August and October–May, the lowest months.
Only Buenos Aires, in our data
Buenos Aires is the only city on Wallace's Line with enough records to rate Little Water Opossum sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Little Water Opossum is recorded against all the mammals logged in Buenos Aires (14 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.
