çayka

/tʃajka/

Cases

SingularPluralWhen to use it
nominativeçaykathe gullçaykalathe gullsthe plain dictionary form — the doer of the sentence
genitiveçaykanıthe gull'sçaykalanıthe gulls'the owner — whose it is
accusativeçaykanıthe gull (as the object)çaykalanıthe gulls (as the object)a specific, known object — whom or what
dativeçaykağato the gullçaykalağato the gullsdirection or recipient — to where, to whom
locativeçaykadaat / in the gullçaykaladaat / in the gullswhere it is; also having — mende bar, "I have it"
ablativeçaykadanfrom the gullçaykaladanfrom the gullswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
myçaykammy gullçaykalarımmy gulls
yourçaykangyour gullçaykalarıngyour gulls
his / herçaykasıhis / her gullçaykalarıhis / her gulls
ourçaykabızour gullçaykalarıbızour gulls
you all'sçaykağızyou all's gullçaykalarığızyou all's gulls
theirçaykalarıtheir gullçaykalarıtheir gulls

The overlap in the last rows is real, not a mistake: çaykaları can mean "his / her gulls", "their gull", or "their gulls" — context decides.