Elk

Source: Monster Manual p. 322. Available in the SRD and the Basic Rules (2014)

"name": "Elk"
"size": "Large"
"type": "beast"
"alignment": "Unaligned"
"ac": !!int "10"
"hp": !!int "13"
"hit_dice": "2d10 + 2"
"modifier": !!int "0"
"stats":
  - !!int "16"
  - !!int "10"
  - !!int "12"
  - !!int "2"
  - !!int "10"
  - !!int "6"
"speed": "50 ft."
"senses": "passive Perception 10"
"languages": ""
"cr": "1/4"
"traits":
  - "desc": "If the elk moves at least 20 feet straight toward a target and then hits\
      \ it with a ram attack on the same turn, the target takes an extra 7 (2d6) damage.\
      \ If the target is a creature, it must succeed on a DC 13 Strength saving throw\
      \ or be knocked prone."
    "name": "Charge"
"actions":
  - "desc": "*Melee Weapon Attack:* +5 to hit, reach 5 ft., one target. *Hit:* 6 (1d6\
      \ + 3) bludgeoning damage."
    "name": "Ram"
  - "desc": "*Melee Weapon Attack:* +5 to hit, reach 5 ft., one prone creature. *Hit:*\
      \ 8 (2d4 + 3) bludgeoning damage."
    "name": "Hooves"
"source":
  - "MM"
"image": "/3-Mechanics/CLI/bestiary/beast/token/elk.webp"

Environment

grassland, forest, hill