Compsocerus violaceus
In 3 days ~20% in a week ~30%
Compsocerus violaceus is a species of beetle in the family Cerambycidae. It occurs in South America, being common in southern Brazil, northern Argentina and Uruguay. Compsocerus violaceus is considered an agricultural pest, attacking several cultivated tree species, such as acacias, eucalypts, willows, fig trees, citrus trees and peach trees. Eggs are laid on tree trunks, usually inside small fissures in the bark. After eclosion, the larvae build a gallery below the bark in branches with diameters between two and six cm and start to feed on the wood, taking about ten months to become adults. Adults have been reported to feed on fruits, flowers, and sap leaking from injured tree trunks.
Species that serve as host for Compsocerus violaceus include: Friday Fellow: Violaceus longhorned beetle at Earthling Nature. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montevideo | 🇺🇾 Uruguay | |
| 2 | Buenos Aires | 🇦🇷 Argentina | |
| 3 | Porto Alegre | 🇧🇷 Brazil | |
| 4 | São Paulo | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Compsocerus violaceus sighting in Porto Alegre on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 196th most-seen of the 226 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
September to December
In those months about 10% of wildlife watchers report a Compsocerus violaceus in Porto Alegre on a given day, against under 5% in January to August, the lowest months.
Among the best
Of the 4 cities where we can rate Compsocerus violaceus sightings, Porto Alegre ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Montevideo (Uruguay, about 10%) and Buenos Aires (Argentina, about 10%).
Same family: Cerambycidae
The closest relatives of the Compsocerus violaceus that you can see in Porto Alegre (family Cerambycidae, Longhorn Beetles) are Retrachydes thoracicus (about 10%), Chydarteres striatus (about 10%) and Cotyclytus curvatus (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Compsocerus violaceus is recorded against all the insects logged in Porto Alegre (5 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.
