ABSTRACT
The records of 666 casualty collared doves examined at a wildlife hospital in south-west England over a period of five years were reviewed. Signs of metabolic bone disease were recorded in 51.2 per cent of the juvenile birds but in only 9.6 per cent of the adults. The incidence of the condition was highest between December and February and decreased almost to zero between June and August. Histological lesions in 11 of the juvenile doves were consistent with vitamin D deficiency, possibly as a result of inadequate exposure to uvb light during the short winter days.
Subject(s)
Bird Diseases/epidemiology , Bone Diseases, Metabolic/veterinary , Columbidae , Vitamin D Deficiency/veterinary , Age Factors , Animals , Animals, Wild , Bird Diseases/pathology , Bone Diseases, Metabolic/epidemiology , Bone Diseases, Metabolic/pathology , England/epidemiology , Female , Incidence , Male , Retrospective Studies , Seasons , Sunlight , Vitamin D Deficiency/complications , Vitamin D Deficiency/epidemiologySubject(s)
Anseriformes , Bird Diseases/diagnosis , Cholangitis/veterinary , Cholelithiasis/veterinary , Hepatitis, Animal/diagnosis , Animals , Bird Diseases/pathology , Bird Diseases/therapy , Cholangitis/diagnosis , Cholangitis/pathology , Cholelithiasis/diagnosis , Cholelithiasis/pathology , Chronic Disease , Diagnosis, Differential , Female , Hepatitis, Animal/pathology , Treatment OutcomeABSTRACT
Detailed ophthalmological examinations were made on 128 of the 216 free-living tawny owls (Strix aluco) examined at a wildlife hospital in the south west of England during the years 2000 to 2002. There were significant lesions in the eyes of 96 (75 per cent) of the birds examined. There were 147 adult birds admitted, of which 89 (60.5 per cent) were due to road traffic accidents; only 13 of these birds (14.6 per cent) were normal. Sixty-nine juvenile birds were admitted, 36 (52 per cent) of them as 'orphans'. Only 25 of the juvenile birds were examined ophthalmologically, and of these 13 (52 per cent) were normal. The ophthalmological examination included a Schirmer tear test the results of which were consistently lower than is normal for some other families of birds.
Subject(s)
Bird Diseases/pathology , Eye Diseases/veterinary , Strigiformes , Animals , England , Eye/pathology , Eye Diseases/pathologySubject(s)
Capillaria/isolation & purification , Enoplida Infections/veterinary , Hedgehogs , Pneumonia/veterinary , Sputum/parasitology , Strongylida Infections/veterinary , Strongylida/isolation & purification , Animals , Enoplida Infections/diagnosis , Enoplida Infections/parasitology , Pneumonia/diagnosis , Pneumonia/parasitology , Predictive Value of Tests , Strongylida Infections/diagnosis , Strongylida Infections/parasitology , Trachea/parasitologyABSTRACT
Following bans on the use of most lead angling weights, the incidence of lead poisoning cases in Mute Swans started to fall and the population started to increase. However, surveys of lead levels in blood of rescued swans continue to show that a high proportion of the birds are carrying levels in excess of 1.21 mol/l. Since rescued swans, although rescued for many different reasons, might be a biased sample, a survey was made of apparently healthy birds living in flocks in the summer. These too showed that a high percentage of the birds in most of the flocks sampled had blood lead levels in excess of 1.21 mol/l. No source of this lead has been identified other than lead fishing weights; these may be long-lost leads, current, but illegally used weights or "dust-shot" which it is still legal to use. Although many of the birds sampled are carrying lead burdens that are probably not harmful, others are seriously affected. Except in the most serious cases, it is not possible to recognise birds with elevated lead levels without taking a blood sample for assay.
