Owls (The British Natural History Collection Book 1)
Format: PDF / Kindle (mobi) / ePub
If you want to know anything about owls, this is the book for you. It reveals all sorts of curious and unexpected facts about the owls found in Britain and also some oddities about those found elsewhere. Chris Mead, who was one of Britain's foremost ornithologists, also gives readers helpful advice on how to observe and count their local owls and how to assist in protecting them. This edition is illustrated throughout with drawings and cartoons by renowned wildlife artist Guy Troughton. The hardback edition of the book also includes a gallery of colour photographs by Mark Hancox.
present in all of the Tawny Owls that they tested. A comparative central European study by Kučera found Leucocytozoon in 9.9 per cent of the owls examined, Plasmodium in 2.3 per cent of cases and Trypanosoma in 7 per cent of cases. Available evidence suggests that Leucocytozoon blood parasites are only slightly pathogenic to owls, but they have been linked to a decline in host fitness and lowered productivity (Korpimäki et al., 1993). Tawny Owls appear to continue carrying these blood parasites
be nesting within or adjacent to established Eagle Owl territories. FIG 144. Peregrines nesting within an area with a high density of Eagle Owls showed a decline in their productivity. (Edmund Fellowes) Direct evidence of British Eagle Owls taking other birds of prey is lacking. However, the remains of a first-year female Hen Harrier were found near an Eagle Owl nest in the Forest of Bowland and were thought to be the result of Eagle Owl predation (Mark Grantham, pers. comm.). In June 2010,
491–498. Schaub, M., Ullrich, B., Knötzsch, G., Albrecht, P. & Meisser, C. (2006) Local population dynamics and the impact of scale and isolation: a study on different Little Owl populations. Oikos 115: 389–400. Schelling, E., Thür, B., Griot, C. & Audigé, L. (1999) Epidemiological study of Newcastle Disease in backyard poultry and wild bird populations in Switzerland. Avian Pathology 28: 263–272. Schettler, E., Langgemach, T., Sömmer, P., Streich, J. & Frölich, K. (2001). Seroepizootiology of
chicks, which sometimes rush at the arriving male, may be fed directly by him. In Eagle Owl, the female spends most of the day at the nest while the chicks are less than a month of age, again with the male responsible for prey provision and nest defence, but once the chicks are older, the female will increasingly tend to use a different roost – though close enough to be able to see the nest site. This feature is also seen in other owl species, for example Barn Owl. The decision made by the female
Dixon calculated that 17 per cent of adult and 24 per cent of juvenile Barn Owls are likely to be lost to road mortality each year. Illner (1991b) examined how road deaths related to the known breeding populations of owls living within his 125 km2 study area in Germany, calculating that 6.5 per cent of adult Barn Owls, 4 per cent of adult Little Owls, 1.5 per cent of adult Long-eared Owls and 1 per cent of adult Tawny Owls were killed annually. The figures for young birds during dispersal would