In response to requests for making this list easy to find, adding it to: Age or Ability Specific Forums >> Preschool

Below is a brief roundup of links describing common behavior characteristics and early milestones which may indicate giftedness in infants, toddlers, preschoolers, young children. (This list may be especially useful before IQ test scores tend to stabilize, around 8 years old.)

You may already know... persons may be gifted, and also have one or more learning differences or learning disabilities in addition to being gifted. This combination is called twice exceptional or 2e. Some websites which may be of interest:
- Hoagies, 2e ( https://www.hoagiesgifted.org/what_is_2e.htm )
- Understood.org ( https://www.understood.org/en/articles/adhd-success-stories )
- Davidson Database ( https://www.davidsongifted.org/resource-library/ )

A few lists of milestones... typical development... clues of giftedness... possible clues of 2e:

1- Characteristics of intellectually advanced young people,
...https://www.davidsongifted.org/gifted-blog/characteristics-of-intellectually-advanced-young-people/

2- Parenting Gifted Preschoolers (Milestones - typical development compared with 30% advanced)
...https://www.davidsongifted.org/gifted-blog/parenting-gifted-preschoolers/

3- Archived list, formerly NAGC's list borrowed from the book A Parent's Guide to Gifted Children
((The first item on the NAGC list of Common Characteristics of Gifted Individuals is: Unusual alertness, even in infancy)).

4- Characteristics and Behaviors of the Gifted

5- Characteristics checklist for gifted children

6-Tips for Parents: Helping Parents Understand Their Profoundly Gifted Children,
...https://www.davidsongifted.org/gift...rstand-their-profoundly-gifted-children/

7- Profiles of the gifted and talented which lists 6 different types, categorized by personality/temperament and achievement
...https://www.davidsongifted.org/gifted-blog/profiles-of-the-gifted-and-talented/

8- Bertie Kingore, Ph.D.: High Achieving, Gifted Learner, Creative Thinker? (hat tip to sanne)

9- A common trait in gifted children, often listed amongst identifying characteristics, is alternately described as: "advanced moral reasoning", "well developed sense of justice", "moral sensitivity", "advanced ability to think about such abstract ideas as justice and fairness", "empathy", "compassion". Links to lists of gifted characteristics include several articles on the Davidson Database here and here, SENG (Silverman), SENG (Lovecky).

10- Different from birth, behaviours of young gifted children, "Strengths or admired traits vs Possible Problems" (archived, Canada) This list compares/contrasts positive and negative views of different traits and characteristics typical of gifted children. Think: Synonyms - Antonyms.

11- thread about Early Milestones - what do they mean?

12- SENG video: The Misdiagnosis of Gifted Children

13- book: Misdiagnosis and Dual Diagnoses of Gifted Children and Adults

14- old post with link to article comparing gifted characteristics and ASD characteristics

15- post with checklist comparing gifted and ASD traits (hat tip to BananaGirl)

16- post with link to Gifted Resource Center of New England (GRCNE) article comparing gifted and ASD traits (hat tip to Nolepharm).

Note:
When a website or webpage is NOT FOUND or has been changed and no longer contains the described content, check the WayBack Machine (internet archive) for a backup copy.
- Link: https://archive.org/web/
- Example in this 2018 post, which describes use of the WayBack Machine.