Red-breasted Merganser
Mergus serrator
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderAnseriformes
- FamilyAnatidae (Anàtids)
- GenusMergus (Typical Mergansers)
- SpeciesMergus serrator (Red-breasted Merganser)
Closest Relatives at Ría Lagartos Biosphere Reserve
Blue-winged Teal
Spatula discors
Black-bellied Whistling-Duck
Dendrocygna autumnalis
Ring-necked Duck
Aythya collaris
Swan Goose
Anser cygnoides
Anas cyanoptera
Spatula cyanoptera
Northern Shoveler
Spatula clypeata
Common Teal
Anas crecca
Lesser Scaup
Aythya affinis
Muscovy Duck
Cairina moschata
Northern Pintail
Anas acuta
Fulvous Whistling-Duck
Dendrocygna bicolor
American Wigeon
Mareca americana
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
Quick answers
What are the chances of seeing a Red-breasted Merganser in Ría Lagartos Biosphere Reserve?
About 3% of visitor-days record a Red-breasted Merganser sighting in Ría Lagartos Biosphere Reserve, based on 29 observer-days of citizen-science data from GBIF.
When is the best time to see Red-breasted Merganser in Ría Lagartos Biosphere Reserve?
February has the highest sighting rate for Red-breasted Merganser in Ría Lagartos Biosphere Reserve in our monthly data.