Common Tern - 1949

Sterna hirundo hirundo

In Mathew's time there was stil a small colony on Skokholm Stack, and it was also a common migrant in spring and autumn.  It is believed that it ceased to breed Skokholm in 1916.  Now by no means common even on passage, when it is chiefly seen in September and October.

R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The Birds of Pembrokeshire, The West Wales Field Society