Contents of report
Breeding Bird Survey
Common Birds Census
Constant Effort Sites
Nest Record Scheme
Waterways Bird Survey
What the categories mean
Return to BTO Home Page
HOBBY Falco subbuteo
Conservation Listings Long term trend

Biodiversity Steering Group
Conservation Concern List

UK: Increase

Status Summary
This species is poorly monitored by standard BTO monitoring schemes due to its low population density and unobtrusive habits. Its distribution has increased markedly northwards in England since the 1970s (Gibbons et al. 1993), perhaps linked to increases in its dragonfly prey supplies (Prince & Clarke 1995) and a decreasing dependency on its traditional heathland habitat. Small annual samples of nest record cards only permit analysis of brood size, which appears not to have changed substantially over the last 30 years.

Annual breeding population changes for this species
are not currently monitored by BTO

Table of productivity information for Hobby
Variable Period
Years Mean
Trend Predicted
in first year
in last year
Change Comment
Brood size 30 1968-1998 15 None       Small sample
Insufficient data on clutch size
available for this species


Insufficient data on nest failure
available for this species



Insufficient data on nestling failure
available for this species



Insufficient data on laying date
available for this species



Insufficient data on CES
available for this species



[ Welcome | Contents | Introduction | CBC | WBS | BBS | Heronries | CES | NRS | Alerts ]
[ Summary | Discussion | References | Help | BTO Home Page ]

© 2000 British Trust for Ornithology
BTO, The Nunnery, Thetford, Norfolk IP24 2PU
Tel: (+44) (0) 1842 750050 Fax: (+44) (0) 1842 750030 Email:

Last updated: 7 March, 2001

Page created by Susan Waghorn