Editing Chimney swift (section)

==Conservation status==
[[File:Nesting tower for Chimney Swift GUEJ080501-24.jpg|thumb|Purpose-built towers can provide nesting and roosting locations.|upright]]
In 2010, the [[International Union for Conservation of Nature]] changed the chimney swift's status from [[least concern]] to [[near threatened]]. In 2018, the IUCN changed the chimney swift's status from [[near threatened]] to [[vulnerable species|vulnerable]]. Although the global population is estimated at {{nowrap|7,700,000}}, it has declined precipitously across the majority of its range.<ref name=IUCN/> The causes of population declines are largely unclear, but may be related to the alteration of the insect community due to pesticide use in the early half of the 20th century.<ref name = "Nocera"/> In Canada, they were listed as threatened by [[Committee on the Status of Endangered Wildlife in Canada|COSEWIC]] for several years with a likely future listing as a Schedule 1 species of the [[Species at Risk Act]]. In the U.S., the chimney swift is protected by the [[Migratory Bird Treaty Act of 1918]]. Neither birds nor nests can be removed from chimneys without a federally-issued permit.<ref name = "MDR"/> Populations may have increased historically with the introduction of chimneys to North America by European settlers, providing plentiful nesting opportunities.{{citation needed|date=August 2018}}

After sudden temperature drops, the chimney swift sometimes hunts low over concrete roads (presumably following insect prey drawn to the warmer road), where collisions with vehicles become more likely.<ref name = "Finnis"/> Severe storms, such as [[hurricane]]s, encountered during migration can seriously impact the chimney's swift's survival rates. Chimney swifts caught up in 2005's [[Hurricane Wilma]] were swept as far north as [[Atlantic Canada]] and [[Western Europe]], including six reaching [[Great Britain]], the most ever seen there in a single year.<ref name="BBRC">{{cite journal |last1=Fraser |first1=P. A. |last2=Rogers |first2=M. J. |last3=the Rarities Committee |title=Report on rare birds in Great Britain in 2005 |journal=British Birds |volume=100 |issue=1 |pages=16–61 (Chimney Swift p. 57)}}</ref> More than 700 were found dead. The following year, roost counts in the province of [[Quebec]], Canada showed a decrease of 62 percent, and the overall population in the province was halved.<ref name = "Dionne"/>