The series aired from January to December 1973.

1. Spring in the Green Forest
2. The Call of the Forest
3. Juanito Builds His House
4. Look for the Monster
5. The Fish Thief / Bear Boris is Hungry
6. The Unknown Monster
7. Sharp Tooth's Revenge / The Forest Friends / The Weasel Arrives
8. The Prey / The Laughing Stream
9. The Four Rascals
10. When the Kids Leave
11. Parlotín's Revenge
12. Juanito's Secret Entrance
13. Brillantín Learns His Lesson
14. Pedro in Mortal Danger / Brillantín and the Weasel Try to Catch Pedro
15. The Old Toad / The Singing Toad
16. Emergency Help / Ramón Runs Out of House
17. Paco the Beaver Builds His House with Love
18. The Duck Hunt / Mrs. Quack
19. The Search for Mr. Duck
20. Alarm in the Chicken House / Brillantín and Manchitas
21. A Fun Bird / The Arrival of the Blackbird
22. Confusion / The Jokes of the Mocking Blackbird
23. The Bear is the Matter / Tom and Bear Boris
24. The Falling Plates / The Traps
25. A Capers with Consequences / Pedro's Trick
26. The Ghost Hat
27. Mr. Condor Comes to the Forest
28. The Secret of the Condor
29. Coyote and Gabriel / Take Care, Brillantín
30. The Old Coyote Gives a Lesson in Cunning to Grandma Fox
31. The Long-Legged Heron
32. Nobility Obliges
33. Sweet Dreams
34. The Journey of Grandpa Wisehead
35. Grandma's Trap
36. Valor Tested
37. The Lost Puppy
38. Fox and Hares / The Hunter Trapped
39. Nutcracker's Boast / Proud Nutcracker
40. Rocky Struggles in the World / In Search of Adventures
41. Hunger Betrays
42. The Trap
43. Pedro Changes His Name
44. Tom and the Little Quail
45. A Surprising Moonlight / The Moon Party
46. Parlotín Learns the Lesson
47. The Bear's Big Appetite
48. Pedro Also Wants to Hibernate
49. Little Daniel
50. Watch Out for the Trap, Pedro
51. Whose Other Track Is This?
52. Juanito's Hibernation / Until Spring Arrives

The characters of the series are:

• Juanito the Groundhog
• Juanita
• Mr. Prairie or Juan Marmota, Juanito's father
• Mrs. Prairie, Juanito's mother
• Cuca and Kiko, Juanito's siblings
• Pedro and Orejín, the rabbits
• Parlanchín or Parlotín, the blue jay
• Blas or Juan the otter and Alberto or Beto the marten
• Paquita the quail
• Jaime the skunk
• Ramón the raccoon
• Cascanueces and Carlitos, the squirrels
• Boris the lazy bear
• Brillantín the fox
• Brillantín's grandmother
• The Weasel
• The Snake
• Colirojo or Whitefoot, the falcon
• The Coyote
• Mr. Condor
• Mr. and Mrs. Cuak, the ducks
• Don Sabiondo the frog
• The singing toad
• The turtle
• The owl
• The long-legged heron
• Paco the beaver
• Gabriel the badger
• Negrín the raven
• The black wolf
• The swallow
• Marmoto
• Blackbird
• Carpintonto, the woodpecker
• Uncle Benito, the mouse and his family
• Daniel the field mouse
• Javier, the muskrat
• Púas, the porcupine
• Manchitas, the farm dog
• Minino, the cat
• Mr. Brown, the owner of the farm
• Tom, Mr. Brown's son

The anime was based on the work of Thornton W. Burgess.