48 FAUNA OF NORTH WALES 



1909. There is a larger heronry — fifteen to twenty nests — 

 in Penrhyn Park near the weir, and Mr. S, G. Cummings reports 

 another at Glynllifon Park. The herons described in the 

 Fauna as of Craig-y-don, actually nest on two small wooded 

 islets, knovTi as Cadnant Islands, in the Menai Straits. I 

 visited them in May, 1910, when there apjjeared to be about 

 forty herons there, the majority young but well -fledged birds, 

 out of the nest and standing or walking about at the water's 

 edge. In 1913 there were feAver — onh^ five nests occupied. 

 ]\Ir. W. W. Cobb tells me that a pair nested at Nanhoron in 

 1908 and 1909. The nest has also been observed at Tyddyn 

 Gwyn, Llangian. 



Mr. C. Oldham observes that in North Wales, " Herons are 

 persistently harried by Terns — even the Lesser Tern — if they 

 trespass on the birds' breeding grounds, and occasionally at 

 any rate at other times. On September 11th, 1915, a Common 

 Tern chased a Heron for perhaj)s a quarter of a mile across 

 Afonwen Ba3^ The Tern with shrill cries stooped repeatedly 

 at the Heron, which doubled and twisted to avoid it, keeping 

 close to the surface of the water, and being apparently in a 

 state of frantic terror, crjdng frank, frank, until the Tern 

 desisted, when it flew off across the bay." 



124.— SQUACCO HERON. Ardeola ralloides ralloides (Scop.). 

 Obtained twice, in Denbighshire and Montgomeryshire. 



125. — NIGHT HERON. Nycticorax nycticomx nyclicorax 



(L.). 



Obtained twice in Anglesey, and reported in Flintshire. 



An adult was shot at Rhosneigr, Anglesev, on 31st May, 1919 

 (Coward, Brit. Birds, XIII, 58). 



126.— LITTLE BITTERN. Ixobrychus minutus (L.). 

 Very rare visitor, obtained in Anglesey, Flintshire, and Merioneth. 



127.— AMERICAN BITTERN. Botaurus lentiginosus 

 (Mont.). 



Obtained once in Anglesey. 



128.— COMMON BITTERN. Botaurus stellaris (L.). 

 Winter visitor, not infrequent, especially in the west. 



Mr. H. S. Davenport states that there is evidence that tlie 

 Bittern nested early in the eighties in a marsh between Bala 



