… sufficiently to remove the fine details of the time-series whilst retaining its major features. …
the number of years in the series. The time-series in the current study spanned 33 years so we …

… cases are known of tropical birds ceasing to lay during periods of food shortage. The … breed
all the year round in the Galapagos; at almost any time some birds are commencing to breed …

… 600 species, namely the North American breeding bird survey 9 . The survey has recorded
annual species abundances over a 31-year period along more than 3,000 observation routes …

… Thus, in this way, birds can be tricked into breeding at a time … breeding time can be shifted
to before the time that birds start … time of year in the way this would be done by birds breeding …

… ) forming a 30 year (1975–2004) data series. Here we extend this time series to 35 years. …
In the coniferous plots densities of the ground insectivores increased by 32–39%. Densities …

… that birds skipping breeding do not appropriately release LH during the pre-laying period. …
LH changes from 10 to 30 min post-GnRH injection increased with sampling date (F 1,32 = …

… The proportion of species increasing in number (increase or large increase) was marginally
lower (29%) during the final 10-year period than during the whole 30-year period (32%). …

… These contrasting trends can derive from local factors (eg, land management) that, acting
at smaller spatial scale, can produce different effects in breeding areas [32]. For this species, …

… factor limits bird density at a particular place and time. It is … In 92Yo (30 of 32) of these
studies, breeding density of one … sites is widespread among hole-nesting birds. However, many …

… -term population indices using data from the Common Birds Census and its successor, the
Breeding Bird … is described for Common Birds Census (CBC) and Breeding Bird Survey (BBS) …