Chroicocephalus philadelphia

Bonaparte's gull is a gull found mainly in northern North America. At 28 to 38 cm in length, it is one of the smallest species of gull. Its plumage is mainly white with grey upperparts. During breeding season, Bonaparte's gull gains a slaty-black hood. The sexes are similar in appearance.

Chroicocephalus philadelphia

Wildreturn · CC BY 2.0 · 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
Bonaparte's gullPBDB
Sits inside
ChroicocephalusPBDB
Diet
carnivorePBDB, for Coelurosauria
Life habit
ground dwelling, solitaryPBDB, for Theropoda
Motility
actively mobilePBDB, for Theropoda
Environment
marinePBDB, for Charadriiformes

Time the record covers

At most 118 thousand years on record.

Every occurrence read is dated to somewhere between 129 ka and 11.7 ka, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Pleistocene — about 5 of 5 occurrencesPleistoceneHolocene — about 0 of 5 occurrences147 ka–126 ka Mya — about 0.1 occurrences126 ka–105 ka Mya — about 0.9 occurrences105 ka–84 ka Mya — about 0.9 occurrences84 ka–63 ka Mya — about 0.9 occurrences63 ka–42 ka Mya — about 0.9 occurrences42 ka–21 ka Mya — about 0.9 occurrences21 ka–0 Mya — about 0.4 occurrences629 ka0 Mya

5 occurrences of Chroicocephalus philadelphia on record, most of them in the Pleistocene. 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

5 occurrences

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.

Chroicocephalus philadelphia and its relatives

Pleistocene

Where Chroicocephalus philadelphia and its relatives were recorded in the Pleistocene.

Found in the same rock

208 taxa

The Paleobiology Database records 5 sites for Chroicocephalus philadelphia, 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

4 references

Each of the 5 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 Chroicocephalus philadelphia

Credit
Wildreturn
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Chroicocephalus philadelphia was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itChroicocephalus through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Ord 1815)