Check out nine abundant animals that help support the food chain in their ecosystems!

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Sources:
http://www.bbc.com/earth/story/20150211-whats-the-most-dominant-life-form
https://www.britannica.com/list/the-most-numerous-organisms-in-the-world
http://www.npr.org/sections/thetwo-way/2011/11/03/141946751/along-with-humans-who-else-is-in-the-7-billion-club
https://www.quora.com/Whats-the-worlds-most-numerous-mammal-species
http://plankt.oxfordjournals.org/content/33/5/677.full
http://www.icm.csic.es/bio/projects/gezm/copepods/copepods.htm
https://www.sciencedaily.com/releases/2010/05/100512172444.htm
http://www.wwf.org.au/our_work/saving_the_natural_world/oceans_and_marine/priority_ocean_places/antarctica_and_southern_ocean/biodiversity/antarctic_krill/
http://ensia.com/features/does-one-of-the-worlds-most-abundant-animals-need-protection-from-our-appetite/
https://books.google.com/books?id=8i_vCAAAQBAJ&pg=PA2&lpg=PA2&dq=most+numerous+reptile&source=bl&ots=Hx7_c-4_l3&sig=4ohsCc3NBUR1tehrmSaPZ4nML-k&hl=en&sa=X&ved=0ahUKEwiats2D9YfPAhUFqI8KHR4iDjcQ6AEIXzAN#v=onepage&q=most%20numerous%20reptile&f=false
http://www.waikikiaquarium.org/experience/animal-guide/reptiles/yellow-bellied-sea-snake/
http://entnemdept.ufl.edu/creatures/misc/gastro/brown_garden_snail.htm
http://biology.stackexchange.com/questions/1066/how-many-mice-are-on-the-earth
http://animaldiversity.org/accounts/Mus_musculus/
http://www.columbia.edu/itc/cerc/danoff-burg/invasion_bio/inv_spp_summ/xenopus_laevis.htm
http://www.clemson.edu/cafls/departments/esps/factsheets/household_structural/argentine_ants_hs42.html
http://acreage.unl.edu/SnowFlea
https://projects.ncsu.edu/cals/course/ent425/library/compendium/collembola.html
http://www.nytimes.com/2015/06/30/science/bristlemouth-ocean-deep-sea-cyclothone.html?_r=0
http://incrediblebirds.com/worlds-most-numerous-birds/
https://www.sciencedaily.com/terms/trophic_level.htm
http://onlinelibrary.wiley.com/doi/10.1111/j.1474-919X.1958.tb08787.x/abstract
https://www.daf.qld.gov.au/__data/assets/pdf_file/0011/57845/IPA-Red-Billed-Quelea-Risk-Assessment.pdf

Images:
Red-billed Quelea: https://commons.wikimedia.org/wiki/File:Red-billed_Quelea_(Quelea_quelea)_(6040990915).jpg
Red-billed Quelea Map:
https://commons.wikimedia.org/wiki/File:Blutschnabelweber-Quelea_queleaWorld.png
Red-billed Quelea Flock:
https://commons.wikimedia.org/wiki/File:Red-billed_quelea_flocking_at_waterhole.jpg
Bristlemouth: https://commons.wikimedia.org/wiki/File:FMIB_42683_Cyclothone_canina_Gilbert_Type.jpeg
African Clawed Frog: https://commons.wikimedia.org/wiki/File:Xenopus_laevis_02.jpg
Brown Garden Snail: https://commons.wikimedia.org/wiki/File:Cornu_aspersum_(Segrijnslak).jpg
Argentine Ant: https://commons.wikimedia.org/wiki/File:Linepithema_Argentine_ant.jpg
Springtail: https://commons.wikimedia.org/wiki/File:Orchesella_cincta.jpg
Snow fleas: https://www.flickr.com/photos/robbie1/8517934578 Robbie Sproule
Antarctic krill: https://en.wikipedia.org/wiki/File:Antarctic_krill_(Euphausia_superba).jpg
Copepodkils: https://commons.wikimedia.org/wiki/File:Copepodkils.jpg
Aphid: https://commons.wikimedia.org/wiki/File:Acyrthosiphon_pisum_(pea_aphid)-PLoS.jpg
Copepod: https://commons.wikimedia.org/wiki/File:Corycaeus_sp..png
Copepod Egg Sac: https://commons.wikimedia.org/wiki/File:Mikrofoto.de-ruderfusskrebs10.jpg