Yeadon Tarn was partially frozen today but the gulls didn’t seem too bothered. 🥶
c200 Black-headed Gulls vastly outnumbered their grey-legged Common Gull cousins.
Presumably these two species have a common ancestor?

#GullsOfYeadon
#Chroicocephalus #ridibundus
#Larus #canus #Laridae #VC64 #286L