- “The Birds of Greece, Cyprus & Europe”, Hellenic Ornithological Society 2015
- https://en.wikipedia.org/wiki/Barn_swallow
- https://en.wikipedia.org/wiki/Common_house_martin
- https://www.rspb.org.uk/birds-and-wildlife/wildlife-guides/bird-a-z/house-martin/
- BTO BirdFacts | House Martin
- https://www.birdscanada.org/volunteer/pnw/?targetpg=barsmonitor
- https://www.wbsj.org/activity/event/greenholiday/swallow-guidebook-en/
- https://extension.umd.edu/learn/barn-swallow-friend-farm
- https://extension.umd.edu/sites/extension.umd.edu/files/_docs/programs/woodland-steward/FS798_WMgtBarnSwallow.pdf
- https://www.bto.org/sites/default/files/u25/BTO_HMS_A4_HR%20%282%29.pdf
- https://www.birdscanada.org/bird-science/project-nestwatch/
- https://www.beco-birds.org/wp-content/uploads/2015/01/Lebrun-Southcott_EdibleToronto_Winter2015.pdf
- https://www.beco-birds.org/portfolio-item/barn-swallows-and-social-cues/
- http://www.springalive.net/
- https://partnership.birdlife.org/display/shareit/8946913/VWFa3f23b2be23e422a8ee5b3467767dac6IGZ/Swallows_Nest_workshop_Miguel%20Mu%C3%B1oz%20Carmona(SEO).pdf?version=1
- https://wdfw.wa.gov/sites/default/files/2019-11/robin_nestbox.pdf
- https://www.thespruce.com/swallow-identification-tips-387328
- https://www.bto.org/sites/default/files/house_martins_2017_instructions_v6.pdf
- https://bcswallowconservationproject.files.wordpress.com/2014/05/baswnestmonitoringmethods.pdf