What reading level is the Comparing Animal Traits series?

The Comparing Animal Traits series by Rebecca E. Hirsch is at a Grades 4.4–5.2 reading level (average Grade 4.8). Intended for Middle Grades (Ages 9–12). There are 14 books in the series.

What order should I read the Comparing Animal Traits books?

The Comparing Animal Traits series has 14 books in order: 1. African Elephants, 2. Boa Constrictors, 3. Galapagos tortoises, 4. Gray Wolves, 5. Grizzly bears, and 9 more.

What age is the Comparing Animal Traits series appropriate for?

The Comparing Animal Traits series is recommended for Middle Grades (Ages 9–12). The average content intensity is 1.1/5.

Comparing Animal Traits Books in Order

14 books by Rebecca E. Hirsch. Reading level: Grades 4.4–5.2. Middle Grades (Ages 9–12).

Series books grow with readers — but that's also the trap. Most series start at one reading level and one content intensity and drift upward over the course of the run. Comparing Animal Traits (14 books by Rebecca E. Hirsch) lands at reading level Grades 4.4–5.2, with average content intensity 1.1/5. Intensity stays consistent across the series — a kid who can handle the first book can generally handle the rest.

The reading-order table below lists every book with per-volume reading level and intensity badges so you can spot any escalation before it catches your reader off guard. For a deeper dive into how we score text difficulty vs. emotional weight separately — and why series readers especially benefit from that split — see our methodology page.

Books

Grades 4.4–5.2

Reading Level

1.1/5

Avg. Intensity

Middle Grades

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

First book Latest book

Comparing Animal Traits Reading Order

#	Title	Reading Level	Content
1	African Elephants Rebecca E. Hirsch	Level 4-5	Gentle
2	Boa Constrictors Rebecca E. Hirsch	Level 5-6	Gentle
3	Galapagos tortoises Rebecca E. Hirsch	Level 4-5	Gentle
4	Gray Wolves Rebecca E. Hirsch	Level 4-5	Gentle
5	Grizzly bears Rebecca E. Hirsch	Level 4-5	Gentle
6	Humpback Whales Rebecca E. Hirsch	Level 4-5	Gentle
7	King Cobras Rebecca E. Hirsch	Level 4-5	Gentle
8	Komodo Dragons Rebecca E. Hirsch	Level 4-5	Gentle
9	Leatherback Sea Turtles Rebecca E. Hirsch	Level 4-5	Gentle
10	Mountain Gorillas Rebecca Eileen Hirsch	Level 4-5	Gentle
11	Panther Chameleons Rebecca E. Hirsch	Level 4-5	Gentle
12	Platypuses Rebecca E. Hirsch	Level 4-5	Gentle
13	Siberian Tigers Rebecca E. Hirsch	Level 4-5	Gentle
14	Vampire Bats Rebecca E. Hirsch	Level 4-5	Mild

Level 4-5 Mild

Questions about the Comparing Animal Traits series

What reading level is the Comparing Animal Traits series?: The Comparing Animal Traits series by Rebecca E. Hirsch is at a Grades 4.4–5.2 reading level (average Grade 4.8). Intended for Middle Grades (Ages 9–12). There are 14 books in the series.
What order should I read the Comparing Animal Traits books?: The reading-order table above lists all 14 books with per-volume reading level and intensity ratings. Start with book 1 and read in publication order unless the table indicates a different recommended order for newer readers.
What age is the Comparing Animal Traits series appropriate for?: The Comparing Animal Traits series is recommended for Middle Grades (Ages 9–12). The average content intensity is 1.1/5. Check the intensity trajectory above to see whether content gets heavier across the series — if it does, sensitive readers may want to stop earlier in the run.