oss ada ▁has ▁pale ▁yellow ▁eyes , ▁and ▁the ▁bl ot ch ▁on ▁each ▁wing ▁is ▁relatively ▁large , ▁roughly ▁round , ▁dark ▁and ▁with ▁a ▁pale ▁ring ▁around ▁it . ▁Add itional ▁differences ▁between ▁the ▁two ▁are ▁found ▁in ▁the ▁th orn s ▁on ▁their ▁t ails ▁and ▁other ▁morph ometric ▁features . ▁Both ▁are ▁found ▁around ▁the ▁British ▁Is les , ▁and ▁their ▁ranges ▁broad ly ▁overlap ▁in ▁the ▁se as ▁around ▁this ▁arch ip el ago , ▁but ▁D . ▁c f . ▁inter med ius ▁is ▁the ▁most ▁frequent ▁species ▁in ▁the ▁northern ▁half ▁( off ▁Scotland ▁and ▁Northern ▁Ireland ), ▁and ▁D . ▁c f . ▁fl oss ada ▁is ▁the ▁most ▁frequent ▁in ▁the ▁south west ▁( C elt ic ▁Sea ) ▁and ▁at ▁Rock all . ▁The ▁primary — poss ibly ▁only — species ▁in ▁I cel and ▁is ▁D . ▁c f . ▁fl oss ada ▁based ▁mainly ▁on ▁the ▁IC ES ▁International ▁B ottom ▁T raw l ▁Survey ▁and ▁zo ological ▁spec im ens , ▁the ▁species ▁off ▁Norway ▁is ▁D . ▁c f . ▁inter med ius ▁( no ▁confirmed ▁records ▁of ▁D . ▁c f . ▁fl oss ada , ▁but ▁it ▁might ▁occur ), ▁and ▁based ▁on ▁limited ▁data ▁the ▁main ▁in ▁the ▁North ▁Sea , ▁Sk ager rak ▁and ▁Kat te gat ▁is ▁D . ▁c f . ▁inter med ius ▁( although ▁at ▁least ▁one ▁record ▁of ▁D . ▁c f . ▁fl oss ada ▁in ▁this ▁region ,