| Mammals reported in eastern Marajó Island | Folk information on mammal occurrence in Jaranduba, Dunas and Ribanceira Farms, eastern Marajó Island |
| Dasypus septemcinctus | Smaller than the other, walk along the night |
| Dasypus kappleri | Possibly known as “tatu-bola”. Larger than the other |
| Myrmecophaga tridactyla | I saw one passing by my house (Retiro São Geraldo, Ribanceira) |
| Tamandua tetradactyla | They can be found in the “tesos” |
| Alouatta belzebul | They are very noisy |
| Aotus infulatus | Certain time I shot one thinking it was something else |
| Sapajus apella | It is rare here (Retiro São Geraldo, Ribanceira) |
| Saimiri collinsi | They are very common |
| Cerdocyon thous | It is like a fox, very smart, nocturnal |
| Nasua nasua | Like to live in the “teso”. Quati-mundé is the old male, solitary |
| Procyon cancrivorus | Live usually close to the water |
| Lontra longicaudis | Occurs in the igarapé do Siriri, Jaranduba Farm |
| Pteronura brasiliensis | I have seen one far away, on the way to Dunas Farm (Jaranduba) |
| Leopardus pardalis | It attacks and kills the chickens |
| Panthera onca | It is rare around here |
| Mazama americana | Once they were very abundant |
| Ozotoceros bezoarticus | Occurs in the fields during high waters, has a white tail |
| Proechimys sp. | Lives in trees: “dá trepado”. Fur is very red: “pelagem bem vermelha” |
| Hydrochoerus hydrochaeris | Lives only in the fields (Retiro Caju, Jaranduba). I take care of one newborn that was abandoned by its mother (Retiro São Geraldo, Ribanceira) |
| Dasyprocta leporina | It is very yellowish in color |