Rat

Source: Monster Manual p. 335. Available in the SRD and the Basic Rules (2014)

"name": "Rat"
"size": "Tiny"
"type": "beast"
"alignment": "Unaligned"
"ac": !!int "10"
"hp": !!int "1"
"hit_dice": "1d4 - 1"
"modifier": !!int "0"
"stats":
  - !!int "2"
  - !!int "11"
  - !!int "9"
  - !!int "2"
  - !!int "10"
  - !!int "4"
"speed": "20 ft."
"senses": "darkvision 30 ft., passive Perception 10"
"languages": ""
"cr": "0"
"traits":
  - "desc": "The rat has advantage on Wisdom (Perception) checks that rely on smell."
    "name": "Keen Smell"
"actions":
  - "desc": "*Melee Weapon Attack:* +0 to hit, reach 5 ft., one target. *Hit:* 1 piercing\
      \ damage."
    "name": "Bite"
"source":
  - "MM"
"image": "/3-Mechanics/CLI/bestiary/beast/token/rat.webp"

Environment

swamp, urban