Published on 01 July 1912 in Letters

S I R S , — I read Mr. Dunlop’s interesting article ” On Incubation ” in your May number (Vol. V., pp. 322-7) with much interest, a n d also the letters from Messrs. J . Lewis Bonhote and C. L. Collenette in your June issue (Vol. V I . , pp. 29-30). I do n o t agree with Mr. Bonhote in his remarks re the breeding of domestic pigeons. I am willing to grant t h a t in the majority of cases the incubation period in domestic pigeons commences on the laying of the second egg, b u t this is n o t a universal law. In domestic pigeons, as in the wild Columbarian races, the female lays her first egg and then allows a full day to elapse before the second egg is laid. If the female was the only factor as regards incubation, that first egg would n o t be incubated b u t merely stood over a t night until the second egg appeared, a n d then incubation would begin and both the young ones would be hatched simultaneously on the twentieth day from the laying of the first egg. As a matter of fact, in the pigeonworld, the male also takes his due share in incubation, i.e. the female incubates from 4 p.m. to 10 a.m. and the male from 10 a.m. to 4 p.m., and it entirely depends on the individuality of the male as to whether the

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