Pterodroma arminjoniana
The Trindade petrel, also known as the Round island petrel, is a species of seabird and a member of the gadfly petrels. The bird is 35–39 cm (14–15 in) in size, with an 88–102 cm (35–40 in) wingspan.

Forest Botial-Jarvis · CC BY 4.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Also called
- Trinidade petrelPBDB
- Sits inside
- PterodromaPBDB
- Diet
- carnivorePBDB, for Coelurosauria
- Life habit
- ground dwelling, solitaryPBDB, for Theropoda
- Motility
- actively mobilePBDB, for Theropoda
- Environment
- marinePBDB, for Procellariiformes
- Mass
- 394 gWikidata
Time the record covers
At most 12 thousand years on record.
Every occurrence read is dated to somewhere between 11.7 ka and 0 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
2 occurrences of Pterodroma arminjoniana on record, most of them in the Holocene. The Paleobiology Database records this as a living group. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
2 occurrences- Holocene100%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Pterodroma arminjoniana and its relatives
HoloceneWhere Pterodroma arminjoniana and its relatives were recorded in the Holocene.
Found in the same rock
52 taxa- Alopecoenas erythropterus1 site
- Anas marecula1 site
- Anous stolidus1 site
- Aplonis1 site
- Ardenna carneipes1 site
- Ardenna grisea1 site
- Ardenna pacifica1 site
- Butorides striata1 site
- Diomedea1 site
- Diomedea amsterdamensis1 site
- Ducula1 site
- Ducula galeata1 site
- Egretta sacra1 site
- Eudyptes chrysocome1 site
- Fregata ariel1 site
- Fregata minor1 site
- Fregetta grallaria1 site
- Gallicolumba1 site
- Gallirallus1 site
- Gallus gallus1 site
- Gygis alba1 site
- Hydrobatidae1 site
- Larus1 site
- Oceanites1 site
The Paleobiology Database records 2 sites for Pterodroma arminjoniana, and this reads all of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
2 references- The fossil avifauna of Amsterdam Island, Indian Ocean1
- Extinction of birds in eastern Polynesia: A review of the record, and comparison with other Pacific island groups1
Each of the 2 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Pterodroma arminjoniana
- Source
- Wikipedia/Commons
- Credit
- Forest Botial-Jarvis
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan of Pterodroma arminjoniana was found in MorphoSource and Sketchfab.
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itPterodroma through timeFormations of the HoloceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Giglioli and Salvadori 1869)