Formerly bred, now a scarce passage migrant. Not recorded in November, January or February
According to Mathew (1894) the Comcrake was a numerous and widespread breeding summer visitor between mid-April and late October. In 1927 Lloyd still found them in widespread localities and noted that they were commoner in Pembrokeshire than they were in south and south-east England. By 1930 he noted that they were decreasing. Lockley et al. (1949) stated that a decline in numbers was first noted in about 1916 and classified the Comcrake as a scarce passage migrant, adding that about 12 were recorded in the spring of 1948. The decline continued with nesting becoming sporadic; four or five clutches were revealed during silage cutting at Thomas Chapel in May 1962, when the farmers reared three young which were released at Dale airfield, and breeding season presence was recorded at Uzmaston in 1965 and 1966 and at Pembroke in 1973. None have been found in the breeding season since. The Comcrake is now scarce on passage with only one or two being recorded each year, usually in September, with about equal frequency from the islands of Skokholm and Skomer and mainland sites such as Carreg Wasted, Llangloffan Fen and Pwllcrochan.
The earliest record was at Skokholm on 14 March 1948 and the latest a freshly dead bird at Pembroke on 10 December 1929.