Rhinostomus barbirostris
In 3 days ~30% in a week ~60%
Rhinostomus barbirostris, common name bottlebrush weevil or bearded weevil, is a species of true weevil. Rhinostomus barbirostris can reach a length of 11–40 millimetres (0.43–1.57 in), excluding beak. It is probably the third-largest weevil in the world. The basic color is black. The pronotum is as long as wide and densely punctate. The elytra bear distinct striae and are deeply punctate. Males have characteristic long reddish gold hairs on the apical portion of the long, straight, and dorsally dentate rostrum. The antennae are long and slender, and strongly elbowed. The front tibiae have two or more large, sharp teeth on the inner face. This species shows an unusual sexual polymorphism, as some males in each population are smaller than other males and resemble females.
This common and widespread species occurs mainly in Central America and South America, while similar species in the genus occur in the United States, Africa, Madagascar, Borneo, and India. Gwannon Patricia Vaurie Weevils of the Tribe Sipalini (Coleoptera, Curculionidae, Rhynchophorinae) Part 1. The Genera Rhinostomus and Yuccaborus
Key to species of Rhinostomus... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brownsberg Nature Park | 🇸🇷 Suriname | |
| 2 | Marino Ballena National Park | 🇨🇷 Costa Rica | |
| 3 | Piedras Blancas National Park | 🇨🇷 Costa Rica | |
| 4 | Gandoca-Manzanillo Wildlife Refuge | 🇨🇷 Costa Rica | |
| 5 | Manu National Park | 🇵🇪 Peru | |
| 6 | Soberanía National Park | 🇵🇦 Panama | |
| 7 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 8 | Yasuní National Park | 🇪🇨 Ecuador | |
| 9 | Bastimentos Island National Marine Park | 🇵🇦 Panama | |
| 10 | Manuel Antonio National Park | 🇨🇷 Costa Rica | |
| 11 | Tortuguero National Park | 🇨🇷 Costa Rica | |
| 12 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 13 | Tambopata National Reserve | 🇵🇪 Peru | |
| 14 | Iguaçu National Park | 🇧🇷 Brazil | |
| 15 | La Amistad International Park (Panama) | 🇵🇦 Panama | |
| 16 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manaus | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Bearded Weevil sighting in Gandoca-Manzanillo Wildlife Refuge on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 33rd most-seen of the 72 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
May and December
In those months about 30% of wildlife watchers report a Bearded Weevil in Gandoca-Manzanillo Wildlife Refuge on a given day, against under 5% in January–March, June and September–October, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Bearded Weevil sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
4th of 16
Of the 16 parks where we can rate Bearded Weevil sightings, Gandoca-Manzanillo Wildlife Refuge ranks 4th at about 10%. The best odds are in Brownsberg Nature Park (Suriname, about 40%), Marino Ballena National Park (Costa Rica, about 20%) and Piedras Blancas National Park (Costa Rica, about 10%).
Same order: Coleoptera
The closest relatives of the Bearded Weevil that you can see in Gandoca-Manzanillo Wildlife Refuge (order Coleoptera, Beetles) are Taeniotes scalatus (about 20%), Exophthalmus jekelianus (about 10%) and Elephant Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Bearded Weevil is recorded against all the insects logged in Gandoca-Manzanillo Wildlife Refuge (8 verified sightings from 2019 to 2026), 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.
