{
  "name": "AgainstPest confusion pairs",
  "description": "Species pairs commonly mistaken for one another, with the single distinguishing feature for each.",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "count": 37,
  "pairs": [
    {
      "a": "carpenter-ant",
      "b": "subterranean-termite-swarmer",
      "a_tell": "The thorax seen from the side is evenly rounded in a single smooth arch, with no spines or dips. This is the most reliable carpenter ant feature and it separates the genus from nearly every other large ant.",
      "b_tell": "The waist is broad and straight — the body reads as a single uniform tube with no pinch. A flying ant has a sharply pinched, narrow waist. This is the most reliable feature."
    },
    {
      "a": "carpenter-ant",
      "b": "odorous-house-ant",
      "a_tell": "The thorax seen from the side is evenly rounded in a single smooth arch, with no spines or dips. This is the most reliable carpenter ant feature and it separates the genus from nearly every other large ant.",
      "b_tell": "Crushed workers give off a distinct sweet, musty smell often described as rotten coconut or blue cheese. This is the definitive field test and no other common household ant does it."
    },
    {
      "a": "odorous-house-ant",
      "b": "pavement-ant",
      "a_tell": "Crushed workers give off a distinct sweet, musty smell often described as rotten coconut or blue cheese. This is the definitive field test and no other common household ant does it.",
      "b_tell": "The head and thorax carry fine parallel grooves running front to back, visible under a hand lens as a striped or engraved texture."
    },
    {
      "a": "pavement-ant",
      "b": "little-black-ant",
      "a_tell": "The head and thorax carry fine parallel grooves running front to back, visible under a hand lens as a striped or engraved texture.",
      "b_tell": "Extremely small at 1.5 to 2 mm, noticeably smaller than pavement or odorous house ants seen alongside them."
    },
    {
      "a": "pavement-ant",
      "b": "red-imported-fire-ant",
      "a_tell": "The head and thorax carry fine parallel grooves running front to back, visible under a hand lens as a striped or engraved texture.",
      "b_tell": "Reddish-brown head and thorax with a darker abdomen, and workers of clearly varying sizes within one colony."
    },
    {
      "a": "little-black-ant",
      "b": "pharaoh-ant",
      "a_tell": "Extremely small at 1.5 to 2 mm, noticeably smaller than pavement or odorous house ants seen alongside them.",
      "b_tell": "Very small at under 2 mm and pale yellow to light golden brown, often with a darker abdomen tip, appearing almost translucent against a white surface."
    },
    {
      "a": "little-black-ant",
      "b": "thief-ant",
      "a_tell": "Extremely small at 1.5 to 2 mm, noticeably smaller than pavement or odorous house ants seen alongside them.",
      "b_tell": "Among the smallest household ants at under 2 mm, pale yellow to light brown."
    },
    {
      "a": "pharaoh-ant",
      "b": "thief-ant",
      "a_tell": "Very small at under 2 mm and pale yellow to light golden brown, often with a darker abdomen tip, appearing almost translucent against a white surface.",
      "b_tell": "Among the smallest household ants at under 2 mm, pale yellow to light brown."
    },
    {
      "a": "red-imported-fire-ant",
      "b": "harvester-ant",
      "a_tell": "Reddish-brown head and thorax with a darker abdomen, and workers of clearly varying sizes within one colony.",
      "b_tell": "Large at 5 to 10 mm, red to reddish-brown, with a conspicuous fringe of long hairs beneath the head forming a beard-like structure called a psammophore."
    },
    {
      "a": "german-cockroach",
      "b": "brown-banded-cockroach",
      "a_tell": "Two dark parallel stripes run front to back on the pronotum, the shield-like plate behind the head. This is the single decisive feature.",
      "b_tell": "Two pale transverse bands run across the wings and abdomen, running side to side. The German cockroach's stripes run front to back on the pronotum instead, and this is the key separator."
    },
    {
      "a": "german-cockroach",
      "b": "american-cockroach",
      "a_tell": "Two dark parallel stripes run front to back on the pronotum, the shield-like plate behind the head. This is the single decisive feature.",
      "b_tell": "Very large at 34 to 53 mm, the largest cockroach commonly found in US homes."
    },
    {
      "a": "american-cockroach",
      "b": "oriental-cockroach",
      "a_tell": "Very large at 34 to 53 mm, the largest cockroach commonly found in US homes.",
      "b_tell": "Very dark, almost glossy black to deep reddish-brown, noticeably darker than any other common house cockroach."
    },
    {
      "a": "american-cockroach",
      "b": "smoky-brown-cockroach",
      "a_tell": "Very large at 34 to 53 mm, the largest cockroach commonly found in US homes.",
      "b_tell": "Uniform dark mahogany to near-black with a glossy sheen, and — importantly — no pale margin on the pronotum, which separates it from the American cockroach."
    },
    {
      "a": "oriental-cockroach",
      "b": "smoky-brown-cockroach",
      "a_tell": "Very dark, almost glossy black to deep reddish-brown, noticeably darker than any other common house cockroach.",
      "b_tell": "Uniform dark mahogany to near-black with a glossy sheen, and — importantly — no pale margin on the pronotum, which separates it from the American cockroach."
    },
    {
      "a": "subterranean-termite-swarmer",
      "b": "drywood-termite",
      "a_tell": "The waist is broad and straight — the body reads as a single uniform tube with no pinch. A flying ant has a sharply pinched, narrow waist. This is the most reliable feature.",
      "b_tell": "Fecal pellets are the defining evidence — hard, elongated, roughly 1 mm, six-sided in cross-section with concave faces, and they range from pale cream to dark brown regardless of the wood colour."
    },
    {
      "a": "drywood-termite",
      "b": "powderpost-beetle",
      "a_tell": "Fecal pellets are the defining evidence — hard, elongated, roughly 1 mm, six-sided in cross-section with concave faces, and they range from pale cream to dark brown regardless of the wood colour.",
      "b_tell": "The frass is extremely fine and talc-like, flowing freely like flour when disturbed — this is decisive against drywood termite pellets, which are hard and six-sided."
    },
    {
      "a": "house-mouse",
      "b": "deer-mouse",
      "a_tell": "Droppings are 3 to 6 mm, rod-shaped with pointed ends, and scattered widely rather than deposited in one place — a single mouse produces dozens per day.",
      "b_tell": "Sharply two-toned colouring — brown to greyish above with a crisply white belly, feet, and underside, with a clean dividing line rather than a gradual blend."
    },
    {
      "a": "house-mouse",
      "b": "norway-rat",
      "a_tell": "Droppings are 3 to 6 mm, rod-shaped with pointed ends, and scattered widely rather than deposited in one place — a single mouse produces dozens per day.",
      "b_tell": "The tail is shorter than the head and body combined — laid back along the animal it does not reach the shoulders. This separates it from the roof rat."
    },
    {
      "a": "norway-rat",
      "b": "roof-rat",
      "a_tell": "The tail is shorter than the head and body combined — laid back along the animal it does not reach the shoulders. This separates it from the roof rat.",
      "b_tell": "The tail is longer than the head and body combined — laid back it reaches past the shoulders. This is the decisive separator from the Norway rat."
    },
    {
      "a": "bed-bug",
      "b": "carpet-beetle",
      "a_tell": "Adults are 4 to 5 mm, roughly the size and shape of an apple seed — flat and oval when unfed, swollen and elongated to nearly cylindrical after feeding.",
      "b_tell": "Adults are small, rounded, almost domed beetles 2 to 5 mm, mottled in black, white, and orange scales, or uniformly black depending on species."
    },
    {
      "a": "bed-bug",
      "b": "bat-bug",
      "a_tell": "Adults are 4 to 5 mm, roughly the size and shape of an apple seed — flat and oval when unfed, swollen and elongated to nearly cylindrical after feeding.",
      "b_tell": "Essentially identical to a bed bug in size, colour, and flattened oval shape at normal viewing distance."
    },
    {
      "a": "brown-recluse",
      "b": "cellar-spider",
      "a_tell": "Six eyes arranged in three pairs forming a semicircle, rather than the eight eyes of nearly all other spiders. This requires magnification and is the only reliable diagnostic feature.",
      "b_tell": "Extremely long, thin, fragile legs — up to five or six times the body length — with a small, pale, elongated body."
    },
    {
      "a": "brown-recluse",
      "b": "wolf-spider",
      "a_tell": "Six eyes arranged in three pairs forming a semicircle, rather than the eight eyes of nearly all other spiders. This requires magnification and is the only reliable diagnostic feature.",
      "b_tell": "Eight eyes in three rows, with two very large forward-facing eyes that reflect light brightly under a torch. A recluse has six eyes in three pairs and no eyeshine."
    },
    {
      "a": "brown-recluse",
      "b": "hobo-spider",
      "a_tell": "Six eyes arranged in three pairs forming a semicircle, rather than the eight eyes of nearly all other spiders. This requires magnification and is the only reliable diagnostic feature.",
      "b_tell": "Brown with a faint herringbone or chevron pattern along the abdomen, and uniformly coloured legs without distinct bands."
    },
    {
      "a": "black-widow",
      "b": "false-widow",
      "a_tell": "Mature females are glossy jet black with a red or orange hourglass marking on the underside of the abdomen — visible only from below, so the spider must be seen from underneath or in its web.",
      "b_tell": "Glossy dark brown to purplish-black with a globular abdomen, closely resembling a black widow at a glance."
    },
    {
      "a": "black-widow",
      "b": "cellar-spider",
      "a_tell": "Mature females are glossy jet black with a red or orange hourglass marking on the underside of the abdomen — visible only from below, so the spider must be seen from underneath or in its web.",
      "b_tell": "Extremely long, thin, fragile legs — up to five or six times the body length — with a small, pale, elongated body."
    },
    {
      "a": "yellowjacket",
      "b": "honey-bee",
      "a_tell": "Bright, sharply defined yellow and black banding with a smooth, hairless, glossy body. A honey bee is fuzzy and duller golden-brown by comparison — this is the key separator.",
      "b_tell": "Body is densely covered in fine hairs, giving a fuzzy appearance, and the colouring is muted golden-brown to amber with darker bands rather than bright yellow."
    },
    {
      "a": "yellowjacket",
      "b": "paper-wasp",
      "a_tell": "Bright, sharply defined yellow and black banding with a smooth, hairless, glossy body. A honey bee is fuzzy and duller golden-brown by comparison — this is the key separator.",
      "b_tell": "Long, slender body with a very narrow waist, 16 to 25 mm, usually brown with yellow or reddish markings."
    },
    {
      "a": "paper-wasp",
      "b": "mud-dauber",
      "a_tell": "Long, slender body with a very narrow waist, 16 to 25 mm, usually brown with yellow or reddish markings.",
      "b_tell": "The waist is extremely long and thread-like, far more elongated than any other common wasp — this alone identifies the group."
    },
    {
      "a": "honey-bee",
      "b": "bumble-bee",
      "a_tell": "Body is densely covered in fine hairs, giving a fuzzy appearance, and the colouring is muted golden-brown to amber with darker bands rather than bright yellow.",
      "b_tell": "The entire abdomen is densely furry, including the top — this is the decisive separator from a carpenter bee, whose upper abdomen is shiny, black, and bare."
    },
    {
      "a": "honey-bee",
      "b": "carpenter-bee",
      "a_tell": "Body is densely covered in fine hairs, giving a fuzzy appearance, and the colouring is muted golden-brown to amber with darker bands rather than bright yellow.",
      "b_tell": "The top of the abdomen is shiny, black, and hairless — this is the decisive separator from a bumble bee, whose abdomen is densely furry."
    },
    {
      "a": "carpenter-bee",
      "b": "bumble-bee",
      "a_tell": "The top of the abdomen is shiny, black, and hairless — this is the decisive separator from a bumble bee, whose abdomen is densely furry.",
      "b_tell": "The entire abdomen is densely furry, including the top — this is the decisive separator from a carpenter bee, whose upper abdomen is shiny, black, and bare."
    },
    {
      "a": "blacklegged-tick",
      "b": "american-dog-tick",
      "a_tell": "Adult females have a solid dark reddish-orange abdomen with a distinct solid black shield behind the head, and no white markings or ornamentation.",
      "b_tell": "The shield behind the head carries conspicuous white or silvery mottled ornamentation, unlike the blacklegged tick's solid dark shield."
    },
    {
      "a": "blacklegged-tick",
      "b": "lone-star-tick",
      "a_tell": "Adult females have a solid dark reddish-orange abdomen with a distinct solid black shield behind the head, and no white markings or ornamentation.",
      "b_tell": "Adult females carry a single conspicuous white or cream spot in the centre of the back — the \"lone star\" — which is unmistakable and needs no magnification."
    },
    {
      "a": "american-dog-tick",
      "b": "brown-dog-tick",
      "a_tell": "The shield behind the head carries conspicuous white or silvery mottled ornamentation, unlike the blacklegged tick's solid dark shield.",
      "b_tell": "Uniform reddish-brown with no white ornamentation on the shield, separating it from the American dog tick."
    },
    {
      "a": "american-dog-tick",
      "b": "lone-star-tick",
      "a_tell": "The shield behind the head carries conspicuous white or silvery mottled ornamentation, unlike the blacklegged tick's solid dark shield.",
      "b_tell": "Adult females carry a single conspicuous white or cream spot in the centre of the back — the \"lone star\" — which is unmistakable and needs no magnification."
    },
    {
      "a": "wolf-spider",
      "b": "hobo-spider",
      "a_tell": "Eight eyes in three rows, with two very large forward-facing eyes that reflect light brightly under a torch. A recluse has six eyes in three pairs and no eyeshine.",
      "b_tell": "Brown with a faint herringbone or chevron pattern along the abdomen, and uniformly coloured legs without distinct bands."
    }
  ]
}